QUESTION: Math problem: Solve 164*r - 152*r = -70*r + 5716 - 1288 for r.
ANS: 54
QUESTION: Math problem: Solve 51*v + 45*v - 22*v = -71*v + 4640 for v.
ANS: 32
QUESTION: Math problem: Solve 16*s + 5*s = 42 for s.
ANS: 2
QUESTION: Math problem: Solve 215 - 464 + 235 = 14*a for a.
ANS:
-1