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 56 = 113*r - 109*r. Let z = 22 - 10. Calculate the smallest common multiple of z and r.
[A]: 84


[Q]: Suppose 2*k + 3*l + 2 - 1 = 0, 3*k - 2*l - 5 = 0. Let f be (4/k)/((-1)/(-2)). Suppose 3*r + 5 = f. What is the lowest common multiple of r and 3?
[A]: 3


[Q]: Let l = 5 + -9. Let x = 7 + l. Solve -x*d - 4*w - 17 = 0, 15 = -3*d - 3*w - 0*w for d.
[A]:
-3