6x - 8(-7x + 9x) = -2x - 86x - 8(-7x + 9x) = -2x - 86x - 8(-7x + 9x) = -2x - 86x + 87x - 8*9x = -2x - 86x + 56x - 72x = -2x - 8(6 - 56 + 72)x = -2x - 822x = -2x - 822x + 2x = -824x = -8x = -8/24x = -1/3
Ответ: x = -1/3.
6x - 8(-7x + 9x) = -2x - 8
6x - 8(-7x + 9x) = -2x - 8
6x - 8(-7x + 9x) = -2x - 8
6x + 87x - 8*9x = -2x - 8
6x + 56x - 72x = -2x - 8
(6 - 56 + 72)x = -2x - 8
22x = -2x - 8
22x + 2x = -8
24x = -8
x = -8/24
x = -1/3
Ответ: x = -1/3.