Question

no conjunto R resolva a equação 5.(x+2)-3.(x+6)=40

Answer 1

5.(x+2) - 3.(x+6) = 40
5x+10 - 3x+18 = 40
5x-3x=40-10-18
2x=30-18
2x=12
x=$\frac{12}{2}$
x=6