QUESTION: Math problem: Solve 734*x - 704*x + 390 = 0 for x.
ANS: -13
QUESTION: Math problem: Solve -123 = -4*r - 151 for r.
ANS: -7
QUESTION: Math problem: Solve -2035*h + 1988*h = -752 for h.
ANS: 16
QUESTION: Math problem: Solve 503*r + 1443 = 614*r for r.
ANS:
13