3x+210=330-7x

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Solution for 3x+210=330-7x equation: 



3x+210=330-7x

We move all terms to the left:

3x+210-(330-7x)=0

We add all the numbers together, and all the variables

3x-(-7x+330)+210=0

We get rid of parentheses

3x+7x-330+210=0

We add all the numbers together, and all the variables

10x-120=0

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

10x=120

x=120/10

x=12

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