2a+(8a-1)-(a+2)5=9

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Solution for 2a+(8a-1)-(a+2)5=9 equation: 



2a+(8a-1)-(a+2)5=9

We move all terms to the left:

2a+(8a-1)-(a+2)5-(9)=0

We multiply parentheses

2a+(8a-1)-5a-10-9=0

We get rid of parentheses

2a+8a-5a-1-10-9=0

We add all the numbers together, and all the variables

5a-20=0

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

5a=20

a=20/5

a=4

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