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A / 4 = B / 7 = C / 5 = k A = 4k B = 7k C = 5k A. B. C = 120 (4k)(7k)(5k) = 120 140k = 120 k = 6 / 7 A = 4(6 / 7) = 24 / 7 B = 7(6 / 7) = 42 / 7 C = 5(6 / 7) = 30 / 7 A + B + C = 24 / 7 + 42 / 7 + 30 / 7 = 96 / 7 = 13, 71.

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Sejopeca4653
9

A / 4 = B / 7 = C / 5 = k

A = 4k

B = 7k

C = 5k

A.

B. C = 120

(4k)(7k)(5k) = 120

140k = 120 k = 6 / 7

A = 4(6 / 7) = 24 / 7

B = 7(6 / 7) = 42 / 7

C = 5(6 / 7) = 30 / 7

A + B + C = 24 / 7 + 42 / 7 + 30 / 7 = 96 / 7 = 13, 71.