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).

[Q]: Solve -2*i = -4*x + 1 - 17, 5*i = 5*x + 20 for i.
[A]: 0


[Q]: How many meters are there in fourty-three halves of a kilometer?
[A]: 21500


[Q]: What is 32.79 take away 7?
[A]:
25.79