x+9=4x-54

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Solution for x+9=4x-54 equation: 



x+9=4x-54

We move all terms to the left:

x+9-(4x-54)=0

We get rid of parentheses

x-4x+54+9=0

We add all the numbers together, and all the variables

-3x+63=0

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

-3x=-63

x=-63/-3

x=+21

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