1) 140 - (x/7 + 29) = 140 - (x/7) - 29 = 111 - x/72) 750/(5x - 12) - 56 = 34750/(5x - 12) = 905x - 12 = 750/905x = 8.33x = 8.33/5 = 1.673) 100 / (19 + (15x - 84)/6) = 4100 / (19 + 15x/6 - 84/6) = 4100 / (19 + 2.5x - 14) = 4100 / (5 + 2.5x) = 45 + 2.5x = 252.5x = 20x = 20 / 2.5 = 84) 72 - 64 / (40 - 8x) = 7272 - 64 / (40 - 8x) = 7272 - 8 / (40 - 8x) = 164 / (40 - 8x) = 7164 = 71(40 - 8x)64 = 2840 - 568x568x = 2776x = 2776 / 568x = 4.88
1) 140 - (x/7 + 29) = 140 - (x/7) - 29 = 111 - x/7
2) 750/(5x - 12) - 56 = 34
750/(5x - 12) = 90
5x - 12 = 750/90
5x = 8.33
x = 8.33/5 = 1.67
3) 100 / (19 + (15x - 84)/6) = 4
100 / (19 + 15x/6 - 84/6) = 4
100 / (19 + 2.5x - 14) = 4
100 / (5 + 2.5x) = 4
5 + 2.5x = 25
2.5x = 20
x = 20 / 2.5 = 8
4) 72 - 64 / (40 - 8x) = 72
72 - 64 / (40 - 8x) = 72
72 - 8 / (40 - 8x) = 1
64 / (40 - 8x) = 71
64 = 71(40 - 8x)
64 = 2840 - 568x
568x = 2776
x = 2776 / 568
x = 4.88