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76=2(9a+2)
We move all terms to the left:
76-(2(9a+2))=0
We calculate terms in parentheses: -(2(9a+2)), so:We get rid of parentheses
2(9a+2)
We multiply parentheses
18a+4
Back to the equation:
-(18a+4)
-18a-4+76=0
We add all the numbers together, and all the variables
-18a+72=0
We move all terms containing a to the left, all other terms to the right
-18a=-72
a=-72/-18
a=+4
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