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0.7a=3a+5
We move all terms to the left:
0.7a-(3a+5)=0
We get rid of parentheses
0.7a-3a-5=0
We add all the numbers together, and all the variables
-2.3a-5=0
We move all terms containing a to the left, all other terms to the right
-2.3a=5
a=5/-2.3
a=-2+0.4/2.3
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