4x-40=-x

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Solution for 4x-40=-x equation: 



4x-40=-x

We move all terms to the left:

4x-40-(-x)=0

We add all the numbers together, and all the variables

4x-(-1x)-40=0

We get rid of parentheses

4x+1x-40=0

We add all the numbers together, and all the variables

5x-40=0

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

5x=40

x=40/5

x=8

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