Simultaneous Equations

Question 1:

8x −7y = 11 2x −5y = -7
x=4 y=3

Question 2:

5x −3y = -40 2x −8y = -67
x=-3.5 y=7.5

Question 3:

4x +4y = 68 5x +7y = 103
x=8 y=9

Question 4:

5x +6y = -64 4x −7y = 55
x=-2 y=-9

Question 5:

x +y = 18 4x −4y = 4
x=9.5 y=8.5

Question 6:

5x −7y = 23 7x −7y = 14
x=-4.5 y=-6.5