Question

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

Answer 1

Answer:

6

Step-by-step explanation:

1.     23-X/30-X = 57-X/78-X
2.      (23-x)*(78-x)= (57-x)*(30-x)
3.     23*78 -23*x -x*78+x^2= 57*30-x*30-57*x+x^2
4.   simplify we get the value x =6

  thank you

Answer 2

Answer:

23,30,57,and 78%97

Step-by-step explanation:

find find what should be subtracted from each of 23 3057 and 78% make the