2x+9+x=81

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Solution for 2x+9+x=81 equation: 



2x+9+x=81

We move all terms to the left:

2x+9+x-(81)=0

We add all the numbers together, and all the variables

3x-72=0

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

3x=72

x=72/3

x=24

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