(10a-15)-a=5

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Solution for (10a-15)-a=5 equation: 



(10a-15)-a=5

We move all terms to the left:

(10a-15)-a-(5)=0

We add all the numbers together, and all the variables

-1a+(10a-15)-5=0

We get rid of parentheses

-1a+10a-15-5=0

We add all the numbers together, and all the variables

9a-20=0

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

9a=20

a=20/9

a=2+2/9

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