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: What is prob of sequence tt when two letters picked without replacement from {t: 2, h: 1, u: 1, m: 2}?

Answer: 1/15


Question: Let x = 1 + 14. What is the remainder when 42 is divided by x?

Answer: 12


Question: Solve -4*w + 16 = 4*l, 8*w - 4*l = 3*w - 25 for w.

Answer:
-1