Article: Keeping trash bags in your car will help you collect trash as necessary instead of just tossing it onto the floor. Among the most inexpensive options is to use an empty tissue box. Fill it with plastic bags saved from trips to the grocery or convenience store, and grab a bag whenever you need one. If you're not a fan of using disposable plastic bags, you can use a plastic or glass sealable food storage container. Typically used for storing cereal, you can find a storage container at a grocery or home goods store. Try sticking velcro strips to the bottom so you can secure the storage container to the floor. You always can line it with a trash bag to easily dispose of the trash you've collected. To cut down on disposable plastic, just throw your trash in it, empty it out into your home trash receptacle, then wash it. Try using a container for recyclables and one for non-recyclable trash. Instead of using empty tissue boxes or cereal storage containers, you could always buy a trash can designed specifically for cars. Many models come with either strips that secure it to the car floor or straps that hang it from one of the front seats. You can buy one online or find one at an auto or home improvement store. Cup holders are notorious for collecting all sorts of grime and bits of garbage. After cleaning them out, place a cupcake holder inside each, then change them out periodically. You can also purchase store-bought car cup holder coasters.
Question: What is a summary of what this article is about?
Keep an empty tissue box filled with trash bags in your car. Use a cereal container to collect trash. Purchase a car trash receptacle. Place cupcake liners inside cup holders.

Problem: Article: Shutter speed refers to the amount of time that your lens is actually open. A lower shutter speed will result in a sharper image in terms of visual clarity, but a higher shutter speed will result in more intricate details and color saturation. Importantly, your shutter speed is dependent upon the amount of light that you have access to: the darker it is, the higher your shutter speed will need to be. If your subject is moving, they'll be blurry if your shutter speed is too long. ISO is your camera's sensitivity to light. A lower ISO will result in a smoother image, but requires a lot of light and a lower shutter speed. A higher ISO will result in a grainier image and requires very little light to achieve an exposure. You almost always want to set your ISO as a low as possible, but in low-light conditions this isn't simply possible. For a natural-looking image, try to keep your ISO between 50-200. Aperture, also known as f-stop, refers to the size of the lens where light is allowed to enter. A bigger opening means a larger depth of field, so the f-stop determines how blurry elements in the background will be. Oddly enough, the lower the f-stop setting is, the bigger the lens becomes. In other words, f/1 would be a very blurry background while f/22 will make everything in your frame sharp and detailed. Aperture is sometimes referred to as "f-stop" because the number associated with aperture is the focal stopping point. A higher f-stop requires a longer shutter speed, while a lower f-stop requires a shorter shutter speed. For this reason, you'll only be able to raise your f-stop if there's a lot of light out. When in doubt, set your camera to f/4. It's typically the widest aperture setting in natural light that will still separate your subject from the background to make them stand out. Exposure refers to the way in which aperture, shutter speed, and ISO function together to change how light interacts with a photographic subject. If your photo is too dark, you can try raising the ISO, lowering the aperture, or lowering the shutter speed. If your photo is too bright, you can lower the ISO, raise the aperture, or raise the shutter speed. It all depends on what you want to prioritize in your image: clarity, sharpness, or depth of field. There is no such thing as a good or bad exposure. The trick is to understand when and how you want a certain kind of exposure and adjusting your ISO, aperture, and shutter speed accordingly. Spending 1 to 2 hours with the manual will help you to understand your specific camera more thoroughly. The sooner you can understand how to change the key components of an exposure, the sooner you'll be capable of controlling how your photos look.
Summary: Create sharp images with a low shutter speed to create a sharp image. Use a lower ISO to keep noise out of your photos. Set a lower aperture to create a dynamic depth of field. Adjust ISO, shutter speed, and aperture to control exposure. Read your camera's manual to understand its specific settings.

It doesn't matter which equation you decide to work with or even which variable you choose to solve for, as you should find the same solution no matter what. However, you do want to make the process as simple as possible. You should choose the equation that you think will be easiest to work with. For instance, if there is an equation where one of the coefficients is 1, such as x - 3y = 7, you would choose that as it will be easy to solve for 'x'. For example, let's say our equations are: x - 2y = 10 (equation A) and -3x -4y = 10 (equation B). You would choose to work with x - 2y = 10 because the coefficient of x in this equation is 1. Solving for x in equation A would meaning adding 2y to both sides. Therefore, x = 10 + 2y. For this step, you will need to insert (or substitute) your solution for 'x' into the other solution that you did not work with. This will allow you to find the other variable, in this case 'y'. Let's try it: Insert the 'x' of equation B into equation A: -3(10 + 2y) -4y = 10. You can see that we have taken 'x' out of the equation and inserted what 'x' equals. Now that you have removed one of the variables from the equation, you can solve for the other variable. This is is simply solving a regular one-variable linear equation. Let's solve ours: -3(10 + 2y) -4y = 10 so -30 -6y -4y = 10. Combine the y's: -30 - 10y = 10. Move the -30 over to the other side: -10y = 40. Solve for y: y = -4. To do this, plug your findings for 'y', or the first variable, into one of the equations. Then solve for the other variable, in this case 'x'. Let's try it: Solve for 'x' in equation A by plugging in y = -4: x - 2(-4) = 10. Simply the equation: x + 8 = 10. Solve for x: x = 2. Plug both of the variables into each equation to make sure that they create true equations. Let's see if ours work: Equation A: 2 - 2(-4) = 10 is TRUE. Equation B: -3(2) -4(-4) = 10 is TRUE.
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One-sentence summary --
Begin by solving one equation for either variable. Substitute your findings in Step 1 into the other equation. Solve for the other variable. Solve the second variable. Double check that the variables you have found work for both equations.