Let r = 23 - 15. Suppose 2*u - u = r. Solve -3*z = -u - 4 for z.

4

Suppose -2*w + w = 3*r + 35, -3*r + 4*w = 55. Let b = 15 + r. Solve -2 = -b*x + x for x.

2

Let j(d) be the third derivative of d5⁄60 + d4⁄4 - d3⁄2 - 2*d2. Let o be j(-7). Solve -25 = -9*x + o*x for x.

5

Suppose -4*c = 3*v - 6*v - 39, 2*c - 2*v - 22 = 0. Suppose -5*s = -c*s. Solve -f - 5 = -s*f for f.

-5

Let n(w) = w + 16. Let k be n(-12). Solve -m = -7 + k for m.

3

Suppose -6*z = -3*z. Suppose -5*n + z*n = -100. Solve w = -3*w - n for w.

-5

Suppose 2*y - 5 = w, -5*y - 4*w + 13 = -7*w. Let s be (-9)/(-3) + (3 - 1). Suppose -4*x + s*n + 32 = n, -8 = 2*n. Solve 2*o - x + y = 0 for o.

1

Suppose 17*d - 12*d - 10 = 0. Solve 16 = d*b - 6*b for b.

-4

Let n(q) = q**2 - 5*q - 4. Let m be n(6). Suppose -3*l - 3*r + m = 2*r, 0 = 3*r + 6. Solve b + 0 = l for b.

4

Let y© be the second derivative of -c5⁄20 + c4⁄4 + c3⁄6 + c2⁄2 - 2*c. Let v be y(3). Solve u - 5 = -v*u for u.

1