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: Suppose 26 = -b + 4*j, -2*b + 3*j - 42 = b. Let q(h) = -h**2 - 11*h + 4. What is the units digit of q(b)?

A: 4
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Q: Solve 0 = 3*f - 2*x - 11, 0 = 2*x - 7*x - 5 for f.

A: 3
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Q: Let o be ((-6)/(-2))/(3/(-14)). Suppose 61 = -4*r - 79. What is the units digit of 10/r - 74/o?

A:
5
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