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-0.4a+1.2=5-a
We move all terms to the left:
-0.4a+1.2-(5-a)=0
We add all the numbers together, and all the variables
-0.4a-(-1a+5)+1.2=0
We get rid of parentheses
-0.4a+1a-5+1.2=0
We add all the numbers together, and all the variables
0.6a-3.8=0
We move all terms containing a to the left, all other terms to the right
0.6a=3.8
a=3.8/0.6
a=6+0.2/0.6
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