2x+4=9x+81

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Solution for 2x+4=9x+81 equation: 



2x+4=9x+81

We move all terms to the left:

2x+4-(9x+81)=0

We get rid of parentheses

2x-9x-81+4=0

We add all the numbers together, and all the variables

-7x-77=0

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

-7x=77

x=77/-7

x=-11

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