QUESTION: Math problem: Solve -34*r + 46*r = 72 for r.
ANS: 6
QUESTION: Math problem: Solve -580 = 54*n - 148 for n.
ANS: -8
QUESTION: Math problem: Solve -21774*m + 43531*m - 4231 - 4921 = 21821*m for m.
ANS: -143
QUESTION: Math problem: Solve v - v = -v for v.
ANS:
0