Question

Найти корень уравнения -7х+9(2+х)=-4х+3

Answer 1

-7х+18+9х= -4х+3

2х+18=-4х+3

6х= -15

х=-15/ 6 =-2,5

Answer 2

$- 7x + 9(2 + x) = - 4x + 3 \\ - 7x + 18 + 9x = - 4x + 3 \\ - 7x + 9x + 4x = 3 - 18 \\ 6x = - 15 \\ x = ( - 15) \div 6 \\ x = - 2.5.$
Ответ : х = -2,5.

Удачи))))