Solve for a
a = \frac{44}{21} = 2\frac{2}{21} \approx 2.095238095
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21a-44=0
Combine 5a and 16a to get 21a.
21a=44
Add 44 to both sides. Anything plus zero gives itself.
a=\frac{44}{21}
Divide both sides by 21.
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