Question

what number should be subtracted from each of the following number 23, 30, 57, 78 so that the remainder are in proportion?​

Answer 1

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Step-by-step explanation:

user

let x be subtracted from 23 , 30 , 57 & 78

so ( 23 - x ) , ( 30 - x ) , ( 57 - x ) & ( 78 - x ) are in proportion

We know that

( 23 -x )( 57 - x ) = ( 30 - x )( 78 - x )

》1311- 23x - 57x = 2340 - 78x - 30x

》 2340 - 1311 = - 80x + 108 x

》 929 = 38x

》 x = 929/38

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