Question

find the number which, when added to the terms of the ratio 7:13 makes it equal to the ratio 3:5​

Answer 1

Solution:

Let x should be added to the

terms of the ratio 7:13 makes

it equal to the ratio 3:5

=> (7+x):(13+x) = 3:5

=> (7+x)*5 = (13+x)3

/* If a:b = c:d then ad = bc */

=> 35+5x = 39+3x

=> 5x-3x = 39-35

=> 2x = 4

=> x = 4/2

=> x = 2

Therefore,

Required number = x = 2

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