Question

Решить уравнение:
$5x - (7x + 7) = 9$
​

Answer 1

Ответ:

$5x - (7x + 7) = 9 \\ 5x - 7x - 7 = 9 \\ 5x - 7x = 9 + 7 \\ - 2x = 16 \\ x = - 16 \div 2 \\ x = - 8$

Answer 2

Ответ:

5x−(7x+7)=9

5x−7x−7=9

5x−7x=9+7

−2x=16

x=−16:2

x=−8