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OpenStudy (cloverracer):
Explanation Add: 3/7 + 4/21
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OpenStudy (mathmale):
\[Add: \frac{ 3 }{ 7 }+ \frac{ 4 }{ 21 }\] Doing so requires that we find the LCD (lowest common denominator). Are you able to do that? if so, what is the LCD?
OpenStudy (mathmale):
Hint: 4/21 is fine as is. 3/7 has to be modified to include the LCD.
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