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0.5=2a+3
We move all terms to the left:
0.5-(2a+3)=0
We get rid of parentheses
-2a-3+0.5=0
We add all the numbers together, and all the variables
-2a-2.5=0
We move all terms containing a to the left, all other terms to the right
-2a=2.5
a=2.5/-2
a=-1+0.5/2
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