9(5x-13)-143=10945x - 117 - 143 = 10945x - 260 = 10945x = 109 + 26045x = 369x = 369/45x = 8.2
Ответ: x = 8.2
9(5x-13)-143=109
45x - 117 - 143 = 109
45x - 260 = 109
45x = 109 + 260
45x = 369
x = 369/45
x = 8.2
Ответ: x = 8.2