QUESTION: Math problem: Solve 21*a + 1280 = 39*a + 776 for a.
ANS: 28
QUESTION: Math problem: Solve 194*t + 20691 = 576*t - 213*t - 378*t for t.
ANS: -99
QUESTION: Math problem: Solve -15*c = 11*c + 7*c + 297 for c.
ANS: -9
QUESTION: Math problem: Solve 45*k = 26 + 244 for k.
ANS:
6