Question

Which system has (-2, -2) as the solution? A) x - y = -2
3x - y = 0
Which system has (1, 3) as the solution? B) x - 4y = -8
2x - 3y = -16
Which system has infinite solutions? C) x + y = -4
-3x + 2y = 2

Which system has (-8, 0) as the solution? D) 4x + 6y = -12
2x + 3y = 9
Which system has no solutions? E) x + y = -1
4x + 4y = -4

Answer 1

Just plug in x and y values and see if the equation is still true or not.

Answer 2

oh ok thank you.

Answer 3

you are welcome. For A, B and D you can plug in and know which one is correct.

I will do just A) x = -2, y = -2. Put it in x - y = -2
-2 - (-2) = -2 + 2 = 0
Left side is 0 but the right side is 2. So this is not the answer.
The next one is 3x - y = 0
x = -2, y = -2
3(-2) - (-2) = -6 + 2 = -4. But right side is 0. SO it is not a solution for this one either.

Answer 4

thank you I got them all right :)

Answer 5

cool.