Let d = 42 - 42. Solve -4 = 2*l - d*l for l.

Suppose -3*q = q + 16, q = -5*r + 176. Let a be r/10 + ⁴⁄₁₀. Suppose 2*i = 5*x + 13, -x + 3*x + 18 = a*i. Solve 2 - 14 = i*j for j.

-3

Let h = 23 + -23. Solve -2*z + h + 6 = 0 for z.

3

Suppose 5*n = -2*u + 1 - 11, 4*n = -2*u - 8. Suppose -s + u = -2. Let t(a) = -a + 6. Let d be t(6). Solve -2*q - s*q + 16 = d for q.

4

Let z = 5 + -3. Suppose -y + z = -0*y. Solve 2 = y*h - 6 for h.

4

Suppose -w + 3*t + 24 = 3*w, 4*t - 61 = -5*w. Let n be (-10)/(-15)*w/2. Solve -n*k + 20 = 5 for k.

5

Suppose 19 = 5*s - 3*n, -3*s + 4 = n + 1. Let x(v) = 2*v - 10. Let o be (²⁄₅)/(¹⁴⁄₂₄₅). Let i be x(o). Solve -s*t = -i - 2 for t.

3

Let v be 6/(-1)*(-3 + 2). Let t = -7 + 7. Suppose t = -3*z + 4 + 20. Solve -v*j + 2*j = z for j.

-2

Let c = 20 - 12. Let t(u) = -u**2 + u + 6. Let l be t(6). Let b be (18/c)/((-9)/l). Solve 0 = s - b*s - 15 for s.

-3

Let l = -111 - -69. Let y be (-978)/l - (-2)/(-7). Suppose -3*p = 8 - y. Solve 2 = p*x + 22 for x.

-4

Let d(g) = g3 - 8*g2 + 7*g - 5. Let p be d(7). Let i(k) = k**2 + 3*k - 3. Let u be i(p). Solve -u*r + 4 = -5*r for r.

2