Solve 4*x - 7*x - 21 = 0 for x.

-7

Solve 65*c = 46*c + 171 for c.

9

Solve 14*w = 16*w + 10 for w.

-5

Solve -63*g = -49*g - 42 for g.

3

Solve -9*w + 11 - 2 = 0 for w.

1

Solve 5*x - 10*x = 5 for x.

-1

Solve 58 - 55 = -a for a.

-3

Solve -3*q - 5 = 1 for q.

-2

Solve 20 = -2*r - 3*r for r.

-4

Solve 66*f - 651 = -27*f for f.

7