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Question
Simplify:
`2 5/7+3/14-13/21`
Sum
Solution
`2 5/7+3/14-13/21`
= `19/7+3/14-13/21`
= `(19xx6)/(7xx6)+(3xx3)/(14xx3)-(13xx2)/(21xx2)` ..........(LCM of 7, 14, 21 = 42)
= `114/42+9/42-26/42`
= `(114+9-26)/42=(123-26)/42`
= `97/42=2 13/42`
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