x+21=5x+39

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Solution for x+21=5x+39 equation: 



x+21=5x+39

We move all terms to the left:

x+21-(5x+39)=0

We get rid of parentheses

x-5x-39+21=0

We add all the numbers together, and all the variables

-4x-18=0

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

-4x=18

x=18/-4

x=-4+1/2

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