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What is the sum of 1/4  and 1/7
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What is the sum of 1/4  and 1/7

User Nigel Alderton
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(1)/(4) + (1)/(7) = (1\cdot7)/(4\cdot7) + (1\cdot4)/(7\cdot4) = (7+4)/(28) = (11)/(28)
User Brunocodutra
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(1)/(4)+(1)/(7)\\\\LCD((1)/(4);(1)/(7))=28\\\\(1)/(4)=(7)/(28);\ (1)/(7)=(4)/(28)\\\\(1)/(4)+(1)/(7)=(7)/(28)+(4)/(28)=(11)/(28)
User Pooya Saberian
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