question: Teacher asked me this: Solve -21*m + 42*m = -147 for m.
++++++++++
answer: -7

question: Teacher asked me this: Solve 0 = 18*x - 27*x - 9 for x.
++++++++++
answer: -1

question: Teacher asked me this: Solve 226*j + 202*j - 13*j + 21147 = 44*j for j.
++++++++++
answer: -57

question: Teacher asked me this: Solve -16*d + 710 - 630 = 0 for d.
++++++++++
answer:
5