Math, asked by sadaladke03, 7 months ago

find Dy for the simultaneous equations x-2y=-18;2x-y=9​

Answers

Answered by sujitbangal442
1

Answer:

x−2y=−18

2x−y=9

So by Cramer's rule ,

Δ=∣∣∣∣∣∣12−2−1∣∣∣∣∣∣=3

Δx=∣∣∣∣∣∣−189−2−1∣∣∣∣∣∣=36

Δy=∣∣∣∣∣∣12−189∣∣∣∣∣∣=45

Hence,

x=ΔΔx=336=12

y=ΔΔy=345=15

Similar questions