6. 6(x+2)= -18
6x + 12 = -18
6x = -18-12
6x = -30
x = -5

9. 7(x-5) = -5
7x — 35 = -5
7x = -5+35 = 30
x = 30/7

10. 5(x-5) = 4
5x — 25 = 4
5x = 4-25 = -21
x = 21/5

32. 6(x+3)-5 = 4(x-4)-4
6x + 18 — 5 = 4x — 16 — 4
6x-4x = -16 — 4 — 18 + 5 =
2x = -33
x = -16,5

38. 6(x-2) — 6 (x-1) = -6
6x — 12 — 6x + 6 = -6
6x-6x = -6 + 12 — 6
x  ∈ R