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4a+2=2(4a-5)
We move all terms to the left:
4a+2-(2(4a-5))=0
We calculate terms in parentheses: -(2(4a-5)), so:We get rid of parentheses
2(4a-5)
We multiply parentheses
8a-10
Back to the equation:
-(8a-10)
4a-8a+10+2=0
We add all the numbers together, and all the variables
-4a+12=0
We move all terms containing a to the left, all other terms to the right
-4a=-12
a=-12/-4
a=+3
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