Question

Решите уравнение под номером 811!! Пожалуйста!!

Answer 1

$1) frac{7(x - 6)}{4} + frac{5(x + 1)}{3} - 3(x + 2) \ frac{7x - 42}{4} + frac{5x + 5}{3} - 3x - 6 \ frac{3(7x - 42) + 4(5x + 5) - 36x - 72}{12} \ frac{21x - 126 + 20x + 20 - 36x - 72}{12} \ frac{5x - 178}{12} \ 2) frac{3(x - 8)}{5} + frac{7(x + 5)}{6} = frac{4(7x + 1.5)}{15} + frac{1}{3} \ frac{3x - 24}{5} + frac{7x + 35}{6} = frac{28x + 6}{15} + frac{1}{3} \ 6(3x - 24) + 5(7x + 35) = 2(28x + 6) + 10 \ 18x - 144 + 35x + 175 = 56x + 12 + 10 \ 53x + 31 = 56x + 22 \ 56x - 56x = 22 - 31 \ - 3x = - 9 \ x = 3 \ 3) frac{3(2x + 5)}{8} - frac{2(5x + 7)}{ 3} = frac{7(x - 15)}{4} - frac{55}{8} \ frac{6x + 5}{8} - frac{10x + 14}{3} = frac{7x105}{4} - frac{55}{8} \ 3(6x + 15) - 8(10x + 14) = 6(7x - 105) - 165 \ 18x + 45 - 80x - 112 = 42x - 630 - 165 \ - 62x - 67 = 42x - 795 \ - 62x - 42x = - 795 + 67 \ - 104x = - 728 \ x = 7$