7a-a=15(a-5)

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Solution for 7a-a=15(a-5) equation: 



7a-a=15(a-5)

We move all terms to the left:

7a-a-(15(a-5))=0

We add all the numbers together, and all the variables

6a-(15(a-5))=0



We calculate terms in parentheses: -(15(a-5)), so:

15(a-5)

We multiply parentheses

15a-75

Back to the equation:

-(15a-75)



We get rid of parentheses

6a-15a+75=0

We add all the numbers together, and all the variables

-9a+75=0

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

-9a=-75

a=-75/-9

a=8+1/3

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