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2a+3(1.5a)=39
We move all terms to the left:
2a+3(1.5a)-(39)=0
We add all the numbers together, and all the variables
2a+3(+1.5a)-39=0
We multiply parentheses
2a+3a-39=0
We add all the numbers together, and all the variables
5a-39=0
We move all terms containing a to the left, all other terms to the right
5a=39
a=39/5
a=7+4/5
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