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).

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

Ex Output:
-5


Ex Input:
Three letters picked without replacement from {e: 4, z: 1, r: 9}. What is prob of picking 3 r?

Ex Output:
3/13


Ex Input:
Let s(g) = g**2 - 12*g + 3. Let i be s(12). Solve 1 = 2*p - 4*q + i, 0 = 4*q - 12 for p.

Ex Output:

5