Question

a) 7x + 12 = 2x + 42​

Answer 1

$\sf\:7x + 12 = 2x + 42 \\ \sf\:7x - 2x = 42 - 12 \\ \sf\:5x = 30 \\ \sf\:x = \frac{30}{5} \\ \sf\:x = 6$

Att: Nerd1990

Answer 2

Resposta:

$7x \times 12 = 2x + 42 \\ 7x - 2x = 42 - 12 \\ 5x = 30 \\ x = \frac{30 }{5} \\ x = 6$