question: Teacher asked me this: Solve -243 = -78*j - 9 for j.
++++++++++
answer: 3

question: Teacher asked me this: Solve 6*n - 249 - 1899 = 185*n for n.
++++++++++
answer: -12

question: Teacher asked me this: Solve 253*d + 44*d + 93*d + 335*d = 158*d for d.
++++++++++
answer: 0

question: Teacher asked me this: Solve 63715 = -1830*r - 13145 for r.
++++++++++
answer:
-42