15. First Distribute -6x-4 = 2X + 6 Add 6X on both sides -4 = 8x+6 Subract 6 on both sides 8x=-10 Divide by 8 on both sides X = -10/8 = -5/4 16. -13 17. Cross Multiplication 32 = 3X-3 Add 3 on both sides 35 = 3X Divide by 3 on both sides 35/3 = X 18. Can't see the whole picture 19. Add 7 on both sides 6N = 42. Divide by 6 N = 7 20. 2x+6=-x+1. ---- I cross multiplied 2x+5=-x. ---- I subract 1 on both sides -3x = 5. ----- Subract 2X X=5/-3 ---- I divided it by -3
