2x+21=6x+3

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Solution for 2x+21=6x+3 equation: 



2x+21=6x+3

We move all terms to the left:

2x+21-(6x+3)=0

We get rid of parentheses

2x-6x-3+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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