Question

if 3x-y=7, ax+4y=11 and Dy=26

please ans me fast​

Answer 1

Answer: heya there here is the answer

D =

3

-1

=

(3 × 4) – (1 × - 1)

=

12 + 1

=

13

1

4

Dx =

7

-1

=

(7× 4) – [11× (-1)]

=

28 + 11

=

39

11

4

Dx =

3

7

=

(3×11) – [1× 7]

=

33 - 7  

=

26

1

11

By Cramer's Rule

x

=

Dx

=

39

=

3

D

13

y

=

Dy