120=45+x

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Solution for 120=45+x equation: 



120=45+x

We move all terms to the left:

120-(45+x)=0

We add all the numbers together, and all the variables

-(x+45)+120=0

We get rid of parentheses

-x-45+120=0

We add all the numbers together, and all the variables

-1x+75=0

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

-x=-75

x=-75/-1

x=+75

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