Question

Solve the following simultaneous linear equations using Cramer's Rule. 2x - 5y = 9; 3x -y = 7 n find​

Answer 1

Step-by-step explanation:

Here Δ=

∣

∣

∣

∣

∣

∣

∣

∣

1

2

2

1

5

1

1

7

−1

∣

∣

∣

∣

∣

∣

∣

∣

applying C

2

→C

2

−C

1

and C

3

→C

3

−C

1

∴Δ=

∣

∣

∣

∣

∣

∣

∣

∣

1

2

2

0

3

−1

0

5

−3

∣

∣

∣

∣

∣

∣

∣

∣

=1(−9+5)=−4

Δ

1

=

∣

∣

∣

∣

∣

∣

∣

∣

9

52

0

1

5

1

1

7

−1

∣

∣

∣

∣

∣

∣

∣

∣

Applying C

2

→C

2

+C

3

∴Δ

1

=

∣

∣

∣

∣

∣

∣

∣

∣

9

52

0

2

12

0

1

7

−1

∣

∣

∣

∣

∣

∣

∣

∣

=−1(108−104)=−4

Δ

2

=

∣

∣

∣

∣

∣

∣

∣

∣

1

2

2

9

52

0

1

7

−1

∣

∣

∣

∣

∣

∣

∣

∣

Applying C

1

→C

1

+2C

3

∴Δ

2

=

∣

∣

∣

∣

∣

∣

∣

∣

3

16

0

9

52

0

1

7

−1

∣

∣

∣

∣

∣

∣

∣

∣

=−1(156−144)=−12

and

Δ

3

=

∣

∣

∣

∣

∣

∣

∣

∣

1

2

2

1

5

1

9

52

0

∣

∣

∣

∣

∣

∣

∣

∣

Applying C

1

→C

1

−2C

2

∴Δ

3

=

∣

∣

∣

∣

∣

∣

∣

∣

−1

−8

0

1

5

1

9

52

0

∣

∣

∣

∣

∣

∣

∣

∣

=−1(−51+72)

=−20

Clearly Δ

1

:Δ

2

:Δ

3

=−4:−12:−20=1:3:

PLZ MAKE ME BRAINLIST

Answer 2

Answer:

x=2 and y=-1

please make me brainlist