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22.5-8.5a=8(6a+2.5)
We move all terms to the left:
22.5-8.5a-(8(6a+2.5))=0
We calculate terms in parentheses: -(8(6a+2.5)), so:We get rid of parentheses
8(6a+2.5)
We multiply parentheses
48a+20
Back to the equation:
-(48a+20)
-8.5a-48a-20+22.5=0
We add all the numbers together, and all the variables
-56.5a+2.5=0
We move all terms containing a to the left, all other terms to the right
-56.5a=-2.5
a=-2.5/-56.5
a=1/22.6
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