QUESTION: Math problem: Solve 47*r + 189 = 20*r for r.
ANS: -7
QUESTION: Math problem: Solve 1593*x + 71*x - 94720 = 184*x for x.
ANS: 64
QUESTION: Math problem: Solve -117*x = -98*x + 95 for x.
ANS: -5
QUESTION: Math problem: Solve -765308*d = -765267*d - 779 for d.
ANS:
19