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5a+2(11.5-4a)=8.5+a
We move all terms to the left:
5a+2(11.5-4a)-(8.5+a)=0
We add all the numbers together, and all the variables
5a+2(-4a+11.5)-(a+8.5)=0
We multiply parentheses
5a-8a-(a+8.5)+23=0
We get rid of parentheses
5a-8a-a-8.5+23=0
We add all the numbers together, and all the variables
-4a+14.5=0
We move all terms containing a to the left, all other terms to the right
-4a=-14.5
a=-14.5/-4
a=3+1/1.6
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