Question:
Solve -2158*r = -2126*r + 768 for r..

Answer:
-24

Question:
Solve -34*n = -28*n + 12 for n..

Answer:
-2

Question:
Solve -967 + 1032 = 13*d for d..

Answer:
5

Question:
Solve -5*y - 2300 = 91*y + 1060 for y..

Answer:
-35