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3.5-9a=2(0.5-4)
We move all terms to the left:
3.5-9a-(2(0.5-4))=0
We add all the numbers together, and all the variables
-9a+3.5-(2(-3.5))=0
We add all the numbers together, and all the variables
-9a+10.5=0
We move all terms containing a to the left, all other terms to the right
-9a=-10.5
a=-10.5/-9
a=1+1/6
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