Question

what number must be substracted
from each of the numbers 10,12
19, 24 to get the numbers which are in proportion.​

Answer 1

Answer:

sub 4 from each of four no. 10, 12, 19, 24, to make a proportion

Explanation:

(10-x) : (12-x) = (19-x) : (24-x)

240-34x +x2 = 228-31 +x^2

34x - 31x = 240 - 228

x=4, 3x =12