15=a/5-3

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Solution for 15=a/5-3 equation: 



15=a/5-3

We move all terms to the left:

15-(a/5-3)=0

We get rid of parentheses

-a/5+3+15=0

We multiply all the terms by the denominator


-a+3*5+15*5=0

We add all the numbers together, and all the variables

-1a+90=0

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

-a=-90

a=-90/-1

a=+90

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