Simultaneous Equations

Question 1:

6x 6y = -6 x +3y = 5
x=0.5 y=1.5

Question 2:

6x +6y = -78 5x 5y = -15
x=-8 y=-5

Question 3:

3x +4y = 35 3x +y = 11
x=1 y=8

Question 4:

3x 3y = -9 8x 2y = -12
x=-1 y=2

Question 5:

8x 8y = 68 8x +2y = 73
x=9 y=0.5

Question 6:

3x +4y = 46 7x +3y = 63
x=6 y=7