Question

foro simultaneous equation in 2 and y
if
px =20, Dy = 40 and D=5 then what is
the value of y?​

Answer 1

Dx=25

Dy=50

at D=5

⇒5x=25

⇒x=

5

25

=5

5y=50

⇒y=

5

50

=10

⇒x=5.