7x-(-x)=40

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Solution for 7x-(-x)=40 equation: 



7x-(-x)=40

We move all terms to the left:

7x-(-x)-(40)=0

We add all the numbers together, and all the variables

7x-(-1x)-40=0

We get rid of parentheses

7x+1x-40=0

We add all the numbers together, and all the variables

8x-40=0

We move all terms containing x to the left, all other terms to the right

8x=40

x=40/8

x=5

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