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 Q]: Solve 4*f + 4*z = 0, 0 = -28*f + 29*f - 2*z + 15 for f.
[EX A]: -5

[EX Q]: Let f(c) = 53*c + 6. Let p be f(3). What is the highest common divisor of p and 15?
[EX A]: 15

[EX Q]: Suppose 3*y = -v + 6, -v + 4 = v - 2*y. Suppose 0 = -3*a - 2*c + 1, -4*c + 1 = -3*a - 8*c. Suppose h = 3 + a. Calculate the remainder when h is divided by v.
[EX A]:
1