72=3(x)+x

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Solution for 72=3(x)+x equation: 



72=3(x)+x

We move all terms to the left:

72-(3(x)+x)=0

We add all the numbers together, and all the variables

-(+4x)+72=0

We get rid of parentheses

-4x+72=0

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

-4x=-72

x=-72/-4

x=+18

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