question: Teacher asked me this: Solve -234*c = 93158 - 86138 for c.
++++++++++
answer: -30

question: Teacher asked me this: Solve 78*a - 63*a - 135 = 0 for a.
++++++++++
answer: 9

question: Teacher asked me this: Solve -130*j = -145*j for j.
++++++++++
answer: 0

question: Teacher asked me this: Solve -51*a + 312*a - 1369 - 197 = 0 for a.
++++++++++
answer:
6