Solve the systems of equations below:

1.



x = -1, y = 8


x = -1, y = -8


x = 1, y = 8


x = 1, y = -8





2.



x = -1, y = -4


x = -1, y = 4


x = -4, y = 4


x = -4, y = -4





3.



x = 7, y = 1


x = -7, y = -1


x = 7, y = -1


x = 7, y = 3





4.



x = 2, y = 4


x = -2, y = -4


x = 2, y = -4


x = -2, y = 4





5.



the system of equations has an infinity of solutions


all x and y that satisfy 4x - 2y = 7 are solutions of the system


all x and y that satisfy y = 2x + 3 are solutions of the system


the system of equations does not have a solution




6.



all pairs (x , y) that satisfy x - 3y = -6 are solutions of the system


x = 0, y = -2


x = -6, y = 0


the system of equations does not have a solution





7. What are the values m and n if the system below has an infinity of solutions:


m = 1 and n = 1


m = 1 and n = 0


m = 1 and n = -1


m = -1 and n = 1





8.



x = 6, y = 6 and z = -2


x = 6, y = 3 and z = 2


x = 6, y = 3 and z = -2


x = 3, y = 3 and z = -2







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