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12.1+a/4.9=-0.739
We move all terms to the left:
12.1+a/4.9-(-0.739)=0
We add all the numbers together, and all the variables
a/4.9+12.839=0
We multiply all the terms by the denominator
a+(12.839)*4.9=0
We add all the numbers together, and all the variables
a+62.9111=0
We move all terms containing a to the left, all other terms to the right
a=-62.9111
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