40=4x+x

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Solution for 40=4x+x equation: 



40=4x+x

We move all terms to the left:

40-(4x+x)=0

We add all the numbers together, and all the variables

-(+5x)+40=0

We get rid of parentheses

-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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