2x+12+x=78

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Solution for 2x+12+x=78 equation: 



2x+12+x=78

We move all terms to the left:

2x+12+x-(78)=0

We add all the numbers together, and all the variables

3x-66=0

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

3x=66

x=66/3

x=22

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