Given the system:

2x - 4y = - 34

-3x - y = 2

Solve for the variables that make up the coefficient

matrix:

[a b]

[c d]

a=

b =

c=

d=

X = - 3

Y = 7

a = - 6

b = - 28

C = 9

D = - 7

Step-by-step explanation:

2x - 4y = - 34

-3x - y = 2

2x - 4y = - 34

-12x - 4y = 8

-14x = 42

X = 42/-14

X = - 3

-3x - y = 2

-3 (-3) - y = 2

9-y = 2

9-2 = y

Y = 7

a = 2x

a = 2*-3

a = - 6

b = - 4y

b = - 4*7

b = - 28

C = - 3x

C = - 3*-3

C = 9

D = - y

D = - 7