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Question
Evaluate:
`3/7+(-4)/9-(-11)/7-7/9`
Sum
Solution
`3/7+(-4)/9-(-11)/7-7/9`
⇒ `(3/7-(-11)/7)+((-4)/9-7/9)`
⇒ `(3/7+11/7)+((-4)/9-7/9)`
⇒ `14/7+(-11)/9`
⇒ `2-(-11)/9`
⇒ `(2xx9-11)/9` ⇒`(18-11)/9` ⇒ `7/9`
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