Solve 21 = 5*u - v, -u + 2*v = -81 + 75 for u.

4

Solve 2*f = 6*f + z + 14, -5*f = -4*z + 28 for f.

-4

Solve -3*p - 4*b - 11 + 35 = 0, 5*p - 26 = -2*b for p.

4

Solve 3*y + 17 = -4*r + 1, -2*r - 14 = 3*y for y.

-4

Solve 2*y = -4*a - 6, -20 = 3*y - 6*a + a for y.

-5

Solve -b + 1 = -1, -5*i - 7 = 4*b for i.

-3

Solve 10 = -4*w + 2*r, 3*w - 4*r + 9 = -1 for w.

-2

Solve 2*h = -399 + 401, 0 = c + h - 4 for c.

3

Solve 0 = g + 5*i + 23, 20*g - 17*g - 5*i - 31 = 0 for g.

2

Solve -5*j - 2*n - 54 = 0, 31*j = 28*j + 3*n - 24 for j.

-10