3=x-15/(-1)

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Solution for 3=x-15/(-1) equation: 



3=x-15/(-1)

We move all terms to the left:

3-(x-15/(-1))=0

We multiply all the terms by the denominator


-(x-15+3*(-1))=0



We calculate terms in parentheses: -(x-15+3*(-1)), so:

x-15+3*(-1)

We add all the numbers together, and all the variables

x-18

Back to the equation:

-(x-18)



We get rid of parentheses

-x+18=0

We add all the numbers together, and all the variables

-1x+18=0

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

-x=-18

x=-18/-1

x=+18

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