QUESTION: Math problem: Solve 390 - 290 + 404 = -21*i for i.
ANS: -24
QUESTION: Math problem: Solve -2387*r = -159*r - 57994 - 46722 for r.
ANS: 47
QUESTION: Math problem: Solve 5*a + 7 - 32 = 0 for a.
ANS: 5
QUESTION: Math problem: Solve -3*h = -15*h + 36 for h.
ANS:
3