3-4x=3x-81

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Solution for 3-4x=3x-81 equation: 



3-4x=3x-81

We move all terms to the left:

3-4x-(3x-81)=0

We get rid of parentheses

-4x-3x+81+3=0

We add all the numbers together, and all the variables

-7x+84=0

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

-7x=-84

x=-84/-7

x=+12

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