Write the system of equations as an augmented matrix. Then solve for x and y.

-3x-y=11


-9x-2y=34

Solution =

3 answers

-3x-y=11 *2 both sides
-9x-2y=34

--> -6x-2y=22
-9x-2y=34 subtract second equ from the first

--> 3x=-12
--> x=-4

Substitute -4 in the first equ
--> -6*-4-2y=22
--> 24-2y=22
--> -2y=22-24
--> y=-2/-2=1
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