Solve 2*k - 5*t - 1 - 4 = 0, 5*k - 4*t - 21 = 0 for k.

5

Solve 5*j - 23 = -4*d, 3*d - 6 + 12 = 4*j for j.

3

Solve 36 = a + 5*n + 21, 5*a + 2*n = -17 for a.

-5

Solve -5*r = 5*q + 25, 3*q + 11 = 3*r - 5*r for r.

-4

Solve 3*h + 5*w - 20 = 0, 3*w = -2*h - h + 18 for h.

5

Solve 2*v = 4, -5*m + 2*v + 136 = 115 for m.

5

Solve -42*o + 11 = -c - 38*o, -5*o = -4*c - 22 for c.

-3

Solve 6*h + 20 = -5*v + 3*h, -5*h + 8 = -2*v for v.

-4

Solve 6*h - 10*h + 3*i = 0, -3*h = 5*i for h.

0

Solve -6*z - 4*r + 9 = -3*z, 5*z + 3*r = 4 for z.

-1