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58=28.1+0.15a
We move all terms to the left:
58-(28.1+0.15a)=0
We add all the numbers together, and all the variables
-(0.15a+28.1)+58=0
We get rid of parentheses
-0.15a-28.1+58=0
We add all the numbers together, and all the variables
-0.15a+29.9=0
We move all terms containing a to the left, all other terms to the right
-0.15a=-29.9
a=-29.9/-0.15
a=199+0.050000000000001/0.15
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