Question

RESOLVA a equação do primeiro grau conforme estudos em classe:
2 x – 3 ( 4 – x ) = 18

a )x = 6
b) x = 5
c) x = 4
d) x = 3

Answer 1

Resposta:

x = 6

Explicação passo-a-passo:

$2x-3(4-x)=18\\\\2x-12+3x=18\\\\2x+3x-12=18\\\\5x-12=18\\\\5x=18+12\\\\5x=30\\\\x=\frac{30}{5} \\\\x=6$