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 -i + z + 1 = 0, 17 = 2*i - 7*z + 2*z for i.
answer:
-4


question:
Calculate (-3)/6*10/15.
answer:
-1/3


question:
Let l be 10/35 + 117/7. Suppose -1 = 4*w - l. Suppose -3*i = -c - 12, -3*i - w + 16 = -2*c. Solve 3*o + 3*y = c, 2*y = -4*o + 6*y - 40 for o.
answer:

-5