Question 78

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

Solution

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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