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).

Solve 0 = 4*y + 5*t - 15, 17 = 4*y - t + 4*t for y.
5

What is twenty-one eighths of a centimeter in micrometers?
26250

Let l(h) = -h**3 - 7*h**2 + 8*h + 12. Let w(k) = k**2 - k - 7. What is the remainder when w(-6) is divided by l(-8)?

11