Given a simple high-school level math question, you are required to solve it and provide the final answer. The final answer is always a single number. These questions can range from a variety of topics like simple arithmetic, solving equations, converting a quantity from one unit to another, finding remainders/GCD/LCM, finding probabilities etc. Each question has only one correct answer. This answer can be a positive or negative integer, a fraction or a decimal number. If the answer is a negative number use the hyphen (e.g. -42) symbol for the minus sign. For decimal numbers, do not add extra zeros after the decimal point. For fractional numbers, separate the numerator and denominator using a forward slash (e.g. 3/25).

Input: Consider Input: Suppose -16 = l - 18. Solve -4*h + l*h = 0 for h.

Output: 0


Input: Consider Input: Solve 5*c = 3*z - 31, 0*c + c + 7 = z for c.

Output: -5


Input: Consider Input: Four letters picked without replacement from apwccucpwppwcpmapm. What is prob of picking 2 c, 1 p, and 1 a?


Output: 2/85