standard_description: Apply the properties of operations to generate equivalent expressions. For example, apply the distributive property to the expression 3 (2 + x) to produce the equivalent expression 6 + 3x; apply the distributive property to the expression 24x + 18y to produce the equivalent expression 6 (4x + 3y); apply properties of operations to y + y + y to produce the equivalent expression 3y.
problem_activity: Task
Decide which of the following equations best represents each situation.
| $$x + 2= 10$$ | $$x=10+2$$ | $$2\cdot10=x$$ |
|---------------|------------|----------------|
|  $$x+10=2$$   | $$10x=2$$  |   $$2x=10$$    |
After Lou poured 2 liters of water into a large jug, the jug contained 10 liters of water. How many liters were in the jug to start?
Clara ran 10 miles, which was twice as far as Nina ran. How far did Nina run?


aligns: no