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).
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Question: Solve -i + z + 1 = 0, 17 = 2*i - 7*z + 2*z for i.

Answer: -4


Question: Calculate prob of picking 1 x, 1 r, 1 z, and 1 b when four letters picked without replacement from brrrzaxra.

Answer: 2/63


Question: Let b(d) = d**2 + 9*d + 10. Let p be 1/(1*(-2)/14). Let j be b(p). What is the lowest common multiple of (-4)/(2/j*4) and 11?

Answer:
22