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-3.4(2.7a-1.7)-12a=47.3
We move all terms to the left:
-3.4(2.7a-1.7)-12a-(47.3)=0
We add all the numbers together, and all the variables
-12a-3.4(2.7a-1.7)-47.3=0
We multiply parentheses
-12a-6.8a+5.78-47.3=0
We add all the numbers together, and all the variables
-18.8a-41.52=0
We move all terms containing a to the left, all other terms to the right
-18.8a=41.52
a=41.52/-18.8
a=-2+1/4.7959183673469
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