Question

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Answer 1

Answer:

D

Step-by-step explanation:

X+2y=10

-4x-y=2

first, isolate x in first equation: x=10-2y

substitute value of x in first equation (10-2y) into second equation:

-4(10-2y)-y=2

-40+8y-y=2

7y=42

y=6

put value of y (6) into either equation to solve for x

x+2(6}=10

x+12=10

x=-2

x=-2, y=6

prove by inserting x and y values into either equation

-4x-y=2

-4(-2)-6=2

8-6=2

2=2

or

x+2y=10

-2+2(6)=10

-2+12=10

10=10