3x-9=5x+21-3x

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Solution for 3x-9=5x+21-3x equation: 



3x-9=5x+21-3x

We move all terms to the left:

3x-9-(5x+21-3x)=0

We add all the numbers together, and all the variables

3x-(2x+21)-9=0

We get rid of parentheses

3x-2x-21-9=0

We add all the numbers together, and all the variables

x-30=0

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

x=30

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