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Question
Simplify: `"4a"/7 + "2a"/3 - "a"/7`
Sum
Solution
`"4a"/7 + "2a"/3 - "a"/7`
`= ("12a" - "14a" + "3a")/21`
`= ("15a" - "14a")/21`
`= "a"/21` ...(LCM of 7, 3 = 21)
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