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OpenStudy (anonymous):
Solve for a.
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OpenStudy (anonymous):
36
OpenStudy (anonymous):
7a/12 = 21
OpenStudy (anonymous):
\[\frac{a}{4}+\frac{a}{3}= 21\]\[\frac{a}{4}+\frac{a}{3}-21\text{= }0\]Combine fractions.\[\frac{7}{12} (-36+a)\text{ = }0\]\[a = 36 \]
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