Question 78

$$A + B + C = 427, 3A = 4B = 7C \Rightarrow A =$$

Solution

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given that 

$$A + B + C = 427, 3A = 4B = 7C \Rightarrow$$

B = A3\4  and C = A3\7 put the value 

A + A3\4 +  A3\7 = 427

(28A + 21A + 12A)\28=427 

A = 196 Answer 

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