Simultaneous Equations

Question 1:

4x +2y = 38 7x +6y = 79
x=7 y=5

Question 2:

x 4y = -10 5x +4y = 58
x=8 y=4.5

Question 3:

6x +4y = 74 3x 8y = 2
x=10 y=3.5

Question 4:

x y = -9 7x +7y = 21
x=-3 y=6

Question 5:

3x +y = 16 5x 3y = 22
x=5 y=1

Question 6:

4x +8y = -8 4x +2y = 1
x=1 y=-1.5