Simultaneous Equations

Question 1:

2x 4y = -10 2x +2y = 32
x=9 y=7

Question 2:

2x 2y = -12 2x +5y = 51
x=3 y=9

Question 3:

2x +5y = 13 4x +5y = 21
x=4 y=1

Question 4:

4x +y = 6 4x +2y = 8
x=1 y=2

Question 5:

2x y = 0 x y = -2
x=2 y=4

Question 6:

5x +3y = 75 2x +3y = 48
x=9 y=10