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0.71a+1.42=3.28*1.9+0.31a
We move all terms to the left:
0.71a+1.42-(3.28*1.9+0.31a)=0
We add all the numbers together, and all the variables
0.71a-(0.31a+6.232)+1.42=0
We get rid of parentheses
0.71a-0.31a-6.232+1.42=0
We add all the numbers together, and all the variables
0.4a-4.812=0
We move all terms containing a to the left, all other terms to the right
0.4a=4.812
a=4.812/0.4
a=12+0.012/0.4
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