Solve 4*r - 30 = -2*t, -t = 6*r - 7*r for r.

5

Solve z + 3*f = -16, 5*z - 2*z + 4 = 2*f for z.

-4

Solve -r + 4*a + 21 = 0, -5*r = -4*a + 9*a - 5 for r.

5

Solve -5*f + b - 6 = 0, -2*f - 3 = -4*b + 3 for f.

-1

Solve 4*b - 38 = -2*w, -2*w + 27 = 3*b - 4 for b.

7

Solve -2*k = -2*s, k = 8*k - 2*s + 10 for k.

-2

Solve 8 = -2*n - 4*b, -n + 20*b - 1 = 21*b for n.

2

Solve 5*b + 71 - 86 = 5*g, 5*b = 10 for g.

-1

Solve 2*a - 5*b = -6*b + 1, 3*a - 4*b = 29 for a.

3

Solve -4*j - 12 = -2*w, -3*j = 5*w - 2*j - 8 for w.

2