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What is the value of x in the proportion x + 1 / x+3 = 15/ 21 a.4 b.1/3 c.1/4 d.3

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Ramon Kelly on January 21, 2019

×+1/×+3=15/21×+1=15(×+3)/21×+1=15×+45/2121(×+1)=15×+4521×+21=15×+4521×-15×=45-216×=24×=4


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