Solve 5 = -2*r - 2*f + 15, -3*r = -f - 15 for r.

5

Solve 4*p + 5*y - 21 = 0, -7*y + 2*y = -5*p + 60 for p.

9

Solve -223*n - 2*o + 8 = -225*n, 2*n - 12 = -2*o for n.

1

Solve 3*x + 6*k = 5*k - 22, -x - k - 10 = 0 for x.

-6

Solve 0 = a - 3, -5*f = 7*a - 6*a - 3 for f.

0

Solve -2*o - 10 = -4*t, o + 1 = -4*t + 26 for o.

5

Solve -3*f = z - 10, 2*f + 3*z - 4*z = 15 for f.

5

Solve -t - 56*y = -58*y - 1, -3*t = -y - 13 for t.

5

Solve -3*i - 17 = 3*o - 44, 4*i - 11 = o for o.

5

Solve 0*x - 2*x = 5*f - 15, 3*x - 12 = -4*f for f.

3