3x-219=81-7x

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Solution for 3x-219=81-7x equation: 



3x-219=81-7x

We move all terms to the left:

3x-219-(81-7x)=0

We add all the numbers together, and all the variables

3x-(-7x+81)-219=0

We get rid of parentheses

3x+7x-81-219=0

We add all the numbers together, and all the variables

10x-300=0

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

10x=300

x=300/10

x=30

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