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-12=-5.3+a
We move all terms to the left:
-12-(-5.3+a)=0
We add all the numbers together, and all the variables
-(a-5.3)-12=0
We get rid of parentheses
-a+5.3-12=0
We add all the numbers together, and all the variables
-1a-6.7=0
We move all terms containing a to the left, all other terms to the right
-a=6.7
a=6.7/-1
a=-6+0.7/1
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