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 a be 2/(3 + (-26)/10). Let x be ((-6)/a)/(6/(-320)). What is the units digit of x/6 - 3/(-9)?

A: 1
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Q: Let k be 3/(-2)*(-72)/27. Solve k*w - 6 = w for w.

A: 2
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Q: Let v = 0 - -4. Suppose -u = -5*k - 5, -4*u + 9*k = v*k - 20. Let j = u + -1. What is the units digit of j?

A:
4
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