75=30+3x

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Solution for 75=30+3x equation: 



75=30+3x

We move all terms to the left:

75-(30+3x)=0

We add all the numbers together, and all the variables

-(3x+30)+75=0

We get rid of parentheses

-3x-30+75=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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