Solve 0 = 4*k - 20, 2*k + 0*k = -3*i + 4 for i.

-2

Solve 5*r + 5*c = -10, -4*r + 21*c - 16*c + 19 = 0 for r.

1

Solve -f = -x + 7, 7*x + 3*f + 9 = 4*x for x.

2

Solve -9*k + 4*w - 1 = -10*k, 0 = 3*k + 3*w - 12 for k.

5

Solve -25 + 20 = -3*z + a, a = -3*z + 13 for z.

3

Solve 6 = 4*o - j - 11, -15 = -5*o - 5*j for o.

4

Solve 4 = 4*m + 3*f, f + 2*f - 12 = 0 for m.

-2

Solve 2*y = -5*i - 4, 0*y - 2 = y + 4*i for y.

-2

Solve -447*a - 2*r = -442*a - 32, 0 = -4*r + 4 for a.

6

Solve -u - 7 = -4*g, 0 = -g - 0*g + 3*u + 10 for g.

1