Question

Equações de primeiro grau com uma incógnita
-12 + 4x= 2x + 24

Answer 1

-12 +4x = 2x +24
4x -2x = 24 + 12
2x = 36
x = 36/2
x = 18

Answer 2

$-12 + 4x= 2x + 24\to \\\\ 4x-2x=24+12\to\\\\ 2x=36\to \\\\ x= \frac{36}{2} \to\\\\ x=18$