Question

-2x-y=14
x-4y=29
solve for an ordered pair using elimination method

Answer 1

Step-by-step explanation:

2x2order

AX=B

-2 -1 x =14

1 -4 y= 29

C=A:B

=-2 -1 :14

1 -4 :29

R2=2R2-R1

=-2 -1 :14

0 -9 :40

Rank of c=2 and unknown =2

-2x-y=14

-9y=40

y=-40/9

-2x+40/9=14

-2x=14+40/9