Question

Which number must be subtracted from 23,30 ,57 and 78 so that the remainder are in proportion?

Answer 1

Hey 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

thank you

Answer 2

Answer:

this is correct answer. .....not 1st one correct answer is 6