Solve 4*t = 3*x - 15, 2*t - 20*x + 5 = -21*x for t.
-3
Solve -2*t = -4*l - 14 - 14, -5*l - 21 = t for t.
4
-5
Solve 22*i - t + 3 = 25*i, i = -t - 1 for i.
2
Solve 4*m + b = 20, -m + 2*b + 1 = 5 for m.
4
Solve 0 = -4*z + 3*n - 15, -68*n = -69*n + 5 for z.
0
Solve -5*q = -7*q - 10, f - 4*q = 15 for f.
-5
Solve 0*z = z + 5*d - 18, 3*d - 18 = -3*z for z.
3
Solve -4*y = 5*k - 35, -9*y + 3*k = -14*y + 34 for y.
5
Solve 5*m = -2*b + 18, 0 = b - 5*b - 4 for m.
4