Question

5) If (28-x) is the mean proportional
the
of (23-x) & (19-x) the find the value of x
​

Answer 1

Answer:

(23-x):(28-x):(19-x)

(23-x)/(28-x)=(28-x)/(19-x).

(23-x)×(19-x)=(28-x)×(28-x)

23(19-x)-x(19-x)=28(28-x)-x(28-x)

437-23x-19x+x²=784-28x-28x+x²

-23x-19x+28x+28x+x²-x²=784-437

-42x+56x=347

14x=347

x=347/14