Question

if a compound ratio is 7:5 & 8:x is 84:60 find x

Answer 1

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【】solution :-
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(7 : 5 ) ( 8:x )= 84 : 60

7/ 5 × 8/x = 84 / 60

56/ 5x = 84 / 60

56/84 = 5x / 60

2/3 = x / 12

(2×12) / 3 = x

x = 24 /3

x = 8

VERIFY :

7 /5 × 8 / x = 84 /60

7 / 5 × 8 / x = 7 / 5

now put ,x = 8

7/5 × 8 / 8 = 7 / 5

7 / 5 = 7 /5

hence, proved.

therefore , your answer : x = 8