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9a=2(6a-5)
We move all terms to the left:
9a-(2(6a-5))=0
We calculate terms in parentheses: -(2(6a-5)), so:We get rid of parentheses
2(6a-5)
We multiply parentheses
12a-10
Back to the equation:
-(12a-10)
9a-12a+10=0
We add all the numbers together, and all the variables
-3a+10=0
We move all terms containing a to the left, all other terms to the right
-3a=-10
a=-10/-3
a=3+1/3
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