Q: Solve 269*j + 30*j = 47*j - 3780 for j.

A: -15

Q: Solve 429*d + 83*d = -57*d + 16501 for d.

A: 29

Q: Solve 0 = -168*c + 954 - 3810 for c.

A: -17

Q: Solve -830*f - 1012 = -874*f for f.

A:
23