Question

Qual este valor ?
3.(x-2)-(1-x)=13

Answer 1

Boa noite,

Temos,
$3(x-2)-(1-x)=13$
$(3x-6)-(1-x)=13$
$3x-6-(1-x)=13$
$3x-6-(1)-(-x)=13$
$3x-6-1+x=13$
$3x+x-6-1+6+1=13+6+1$
$3x+x+0=20$
$x(3+1)=20$
$x(4)=20$
$\frac{1}{4}*(4x)=\frac{1}{4}*20$
$x=5$.

Logo, o valor de x é 5.