4x+21=2x+27

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Solution for 4x+21=2x+27 equation: 



4x+21=2x+27

We move all terms to the left:

4x+21-(2x+27)=0

We get rid of parentheses

4x-2x-27+21=0

We add all the numbers together, and all the variables

2x-6=0

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

2x=6

x=6/2

x=3

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