3x+6=66-x

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Solution for 3x+6=66-x equation: 



3x+6=66-x

We move all terms to the left:

3x+6-(66-x)=0

We add all the numbers together, and all the variables

3x-(-1x+66)+6=0

We get rid of parentheses

3x+1x-66+6=0

We add all the numbers together, and all the variables

4x-60=0

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

4x=60

x=60/4

x=15

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