instruction:
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).
question:
Solve 0 = 4*y + 5*t - 15, 17 = 4*y - t + 4*t for y.
answer:
5


question:
Let j(g) = -g**2 + 15*g - 26. Let s be j(9). Let b be 1/((-1)/(-70)) + 0. Calculate the highest common factor of b and s.
answer:
14


question:
Let o = 9 - -56. Let z = o + -35. Suppose -5*u = -2*u - z. Calculate the remainder when 19 is divided by u.
answer:

9