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 r(m) = 2*m**2 + 5*m + 2. Let s be r(-3). Let y(l) = l. Let n be y(s). Suppose d - n = -2*a, -4*d - 3*a + 18 = -d. What is the units digit of d?

A: 7
****
Q: Let f be (4 + -6)*1/2. Let u be (-15)/(-6)*(-2)/f. Suppose 35 = 2*m - u*g, -5*m + 0*g = 3*g - 72. What is the tens digit of m?

A: 1
****
Q: Solve -b - 2*q = 2*q + 21, 2*q - 17 = 5*b for b.

A:
-5
****