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-6(5a-6.5)=22.5
We move all terms to the left:
-6(5a-6.5)-(22.5)=0
We add all the numbers together, and all the variables
-6(5a-6.5)-22.5=0
We multiply parentheses
-30a+39-22.5=0
We add all the numbers together, and all the variables
-30a+16.5=0
We move all terms containing a to the left, all other terms to the right
-30a=-16.5
a=-16.5/-30
a=6.6/12
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