The correct option is B 3
3x+5y=29 -------------(1)
7x+3y=33-------------(2)
According to Cramer's Rule , we have,
D=∣∣∣3573∣∣∣=3×3−5×7
=9−35
=−26
Dx=∣∣∣295333∣∣∣=29×3−5×33
=87−165
=−78
Dy=∣∣∣329733∣∣∣=3×33−7×29
=99−203
=−104
⇒x=(Dx)D and y=(Dy)D
So,
x=(−78)−26=3
and
y=(−104)−26=4