Let q be (4/6)/((-4)/(-30)) - 2. Solve -2*r - q*r = -20 for r.

Suppose 19*x - 16*x = 0. Solve 0 = 2*y - x*y - 10 for y.

5

Let g = -12 - -18. Suppose 5*l - 3*z - 117 = 0, -g*z - 93 = -4*l - 3*z. Solve -5*h + l = -1 for h.

5

Let o(k) be the second derivative of -k⁵⁄₆₀ - k⁴⁄₆ + k**³⁄₆ - k. Let m© be the second derivative of o©. Let n be m(-3). Solve -3*v - 25 = n*v for v.

-5

Suppose 2*o + 18 = 5*o. Solve -2 = z - o for z.

4

Suppose 2*s + 1 - 9 = 0. Suppose -2*k - 10 = -4*k. Suppose -3*d = -0*d + m - 13, 5*m = k*d + 5. Solve -15 = -s*a - d for a.

3

Suppose 0 = 3*m - m - 8. Let f(q) = q3 + q2 - 2q + 1. Let v be f(-2). Let x be 0 - (v-6 + 2). Solve m*z = -0*z + x for z.

1

Suppose d - 33 = 5*u, -5*d + 6*u - 3*u + 55 = 0. Solve -2*p - d = -4*p for p.

4

Let m(s) = 2*s**2 + s - 1. Let u be m(1). Let j = 2 - u. Suppose j = -2*y + 6*y. Solve y = -2*k + 5 - 1 for k.

2

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

-5

Let q = -34 + 47. Solve -2*d + 3 - q = 0 for d.

-5