Question

12 - ( x + 1 ) = 3.( x - 1) resolucao

Answer 1

Resposta:

7/2 ou 3,5

Explicação passo-a-passo:

$12-(x+1)=3(x-1)\\12-x-1=3x-3\\11+3=3x+x\\14=4x\\x=\frac{14}{4} \\x=\frac{7}{2}\\x=3,5$