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: Let c = 5 + 0. Solve -c*u = -2*u + 3 for u.

A: -1
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Q: Calculate -0.4 - 4148.

A: -4148.4
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Q: Let x(q) = -7*q - 32. What is the tens digit of x(-13)?

A:
5
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