45=120+3x

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Solution for 45=120+3x equation: 



45=120+3x

We move all terms to the left:

45-(120+3x)=0

We add all the numbers together, and all the variables

-(3x+120)+45=0

We get rid of parentheses

-3x-120+45=0

We add all the numbers together, and all the variables

-3x-75=0

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

-3x=75

x=75/-3

x=-25

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