Question

2x-y=1; 7x-2y=-7. By. Cramer rule

Answer 1

hello aarti here is your answer by Sujeet,

For coefficient matrix,

2 -1
7 -2
D=-4-(-7)=-4+7=3


For x matrix

1 -1
7. -2

Dx=-2-(-7)=-2+7=5


For y matrix

2. 1
7. -7
Dy=-14+7=-7

Now,
X=Dx/D=5/3

Again,
Y=Dy/D=-7/3


that's all

aarti.........✌✌✌