2x+99=x+78

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Solution for 2x+99=x+78 equation: 



2x+99=x+78

We move all terms to the left:

2x+99-(x+78)=0

We get rid of parentheses

2x-x-78+99=0

We add all the numbers together, and all the variables

x+21=0

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

x=-21

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