Question

Решите пожалуйста! Уравнение

Answer 1

12x+5+7-3x=3

9x=3-12

9x=-9

x=-1

Answer 2

$12x + 5 + 7 - 3x = 3$
$12x - 3x + 5 + 7 = 3$
$9x + 12 = 3$
$9x = 3 - 12$
$9x = - 9$
$x = - 9 \div 9$
$x = - 1$