"Решите уравнение 5(8x-1) -7(4x+1) +8(7-4x) =9"

5(8x-1) - 7(4x+1) + 8(7-4x) = 9

Решение: 40x - 5 - 28x - 7 + 56 - 32x = 9 (40x - 28x - 32x) + (-5 - 7 + 56) = 9 -20x + 44 = 9 -20x = 9 - 44 -20x = -35 x = -35 / -20 x = 7/4

Ответ: x = 7/4