45=9+3x

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Solution for 45=9+3x equation: 



45=9+3x

We move all terms to the left:

45-(9+3x)=0

We add all the numbers together, and all the variables

-(3x+9)+45=0

We get rid of parentheses

-3x-9+45=0

We add all the numbers together, and all the variables

-3x+36=0

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

-3x=-36

x=-36/-3

x=+12

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