Simultaneous Equations

Question 1:

x −3y = -18 x +4y = 45
x=9 y=9

Question 2:

4x +5y = 58 4x −4y = 4
x=7 y=6

Question 3:

5x +5y = 85 4x +5y = 78
x=7 y=10

Question 4:

4x +y = 30 4x −5y = 18
x=7 y=2

Question 5:

2x +3y = 9 x +3y = 6
x=3 y=1

Question 6:

5x −5y = -5 4x −5y = -12
x=7 y=8