We have that
[tex](5x+7)+(15-x)=62[/tex]
Then
[tex]5x+7+15-x=62\Rightarrow5x-x+7+15=62\Rightarrow4x+22=62[/tex][tex]4x+22=62\Rightarrow4x=62-22\Rightarrow4x=40\Rightarrow x=\frac{40}{4}\Rightarrow x=10[/tex]
We need to group similar terms. Then, we sum them algebraically.
We obtain 4x+22=62. We subtract 22 to both sides of the equation, and finally divide both sides of the equation by 4.
