3x=216-x

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Solution for 3x=216-x equation: 



3x=216-x

We move all terms to the left:

3x-(216-x)=0

We add all the numbers together, and all the variables

3x-(-1x+216)=0

We get rid of parentheses

3x+1x-216=0

We add all the numbers together, and all the variables

4x-216=0

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

4x=216

x=216/4

x=54

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