Question

Qual o resultado de : 3.(x-2)-(1-x)=13

Answer 1

$3(x-2)-(1-x)=13 \\ \\ 3x-6-1+x=13 \\ \\ 3x+x=13+6+1 \\ \\ 4x=20 \\ \\ x= \frac{20}{4} =5$

Answer 2

3(x-2) - (1-x) = 13

3x - 6 - (1 - x) = 13

3x - 6 -1 +x = 13

4x - 7 = 13

4x = 13 + 7

4x = 20                 x = 20/4  =  5