Question

Equaçoes do primeiro grau incognita 9x = 5x + 12

Answer 1

9x = 5x + 12

9x - 5x = 12

4x = 12

x = 12/4

x = 3

Answer 2

Resposta:

$9x = 5x + 12\\9x-5x = 5x + 12-5x\\4x = 5x + 12-5x(12-5= 7+5= 12\\4x= 12\\\\\frac{4x}{4} = \frac{12}{4} \\\\x=\frac{12}{4} (12:4= 3 . 4= 12= 3)\\\\x = 3$