7x+2(x+9)=81

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Solution for 7x+2(x+9)=81 equation: 



7x+2(x+9)=81

We move all terms to the left:

7x+2(x+9)-(81)=0

We multiply parentheses

7x+2x+18-81=0

We add all the numbers together, and all the variables

9x-63=0

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

9x=63

x=63/9

x=7

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