Solve 2*a + 3*r - 7 = 0, 86*r - 81*r = -5 for a.

5

Solve -2*n - 2*q = -4*n - 8, -2*n - 2 = 4*q for n.

-3

Solve 3*p - 3*t + 15 = 0, -t = -7*p + 4*p - 9 for p.

-2

Solve -4 = 2*d - 4*o - 8, 4*o + 32 = -5*d for d.

-4

Solve 5*i - 10 = 2*l, -7 - 3 = -5*i - 4*l for i.

2

Solve 2*v - 14 = -5*a, 32 = -6*a + 11*a - 4*v for a.

4

Solve l + 0*l + 4*u = 16, 2*u = 2*l + 8 for l.

0

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

0

Solve z - 4*h = -h - 7, 2*h = -4*z - 14 for z.

-4

Solve -2*c = -2*m - 6, -m + 0 - 3 = 2*c for m.

-3