x+9=4x-36

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Solution for x+9=4x-36 equation: 



x+9=4x-36

We move all terms to the left:

x+9-(4x-36)=0

We get rid of parentheses

x-4x+36+9=0

We add all the numbers together, and all the variables

-3x+45=0

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

-3x=-45

x=-45/-3

x=+15

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