Simultaneous Equations

Question 1:

x y = 2 4x +7y = 63
x=7 y=5

Question 2:

7x +8y = -101 4x 5y = 38
x=-3 y=-10

Question 3:

5x 7y = -38 4x 2y = 2
x=5 y=9

Question 4:

2x +7y = -4 8x 6y = 18
x=1.5 y=-1

Question 5:

5x 4y = 31 5x +2y = 7
x=3 y=-4

Question 6:

3x +4y = 16 2x 8y = 16
x=6 y=-0.5