x+x+x-x+45=x+81

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Solution for x+x+x-x+45=x+81 equation: 



x+x+x-x+45=x+81

We move all terms to the left:

x+x+x-x+45-(x+81)=0

We add all the numbers together, and all the variables

2x-(x+81)+45=0

We get rid of parentheses

2x-x-81+45=0

We add all the numbers together, and all the variables

x-36=0

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

x=36

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