3+2x=21+4x

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Solution for 3+2x=21+4x equation: 



3+2x=21+4x

We move all terms to the left:

3+2x-(21+4x)=0

We add all the numbers together, and all the variables

2x-(4x+21)+3=0

We get rid of parentheses

2x-4x-21+3=0

We add all the numbers together, and all the variables

-2x-18=0

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

-2x=18

x=18/-2

x=-9

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