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).

[EX Q]: In base 14, what is 2 - -129?
[EX A]: 12b

[EX Q]: How many millilitres are there in 7/2 of a litre?
[EX A]: 3500

[EX Q]: Suppose 3*i + 1 = -44. Let s = i - -27. Solve j + 3*b - 4 = -b, 4*j + 2*b + s = 0 for j.
[EX A]:
-4