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).

Example Input: Solve 3*x = t + 11, 2*x = 3*x + 4*t - 21 for x.
Example Output: 5

Example Input: Calculate prob of sequence bnbq when four letters picked without replacement from {c: 3, u: 1, q: 1, d: 2, b: 5, n: 1}.
Example Output: 1/858

Example Input: Solve 26*z = -48*z + 518 for z.
Example Output:
7