Simultaneous Equations

Question 1:

6x +7y = 30 6x 6y = -9
x=1.5 y=3

Question 2:

8x +4y = -16 2x 6y = -32
x=-4 y=4

Question 3:

6x +2y = 25 4x +3y = 10
x=5.5 y=-4

Question 4:

4x +8y = 24 5x +5y = 20
x=2 y=2

Question 5:

6x +8y = 99 8x 8y = 20
x=8.5 y=6

Question 6:

2x 2y = 15 8x +8y = 84
x=9 y=1.5