Question

find the value of DX and DY for the simultaneous equation x+y =20 and x-2y = 2​

Answer 1

Answer:

Dx=25

Dy=50

at D=5

⇒5x=25

⇒x=

5

25

=5

5y=50

⇒y=

5

50

=10

⇒x=5.