Solving Systems by Substitution Day I
Directions: Solve each system using the substitution method. SHOW ALL WORK!!!
1) y = +4
2) y =
–1
3) y = 2x – 2
4) 5x – 5y = 10
x–y=–1
x+y=–6
y = – 2x + 2
2x + 2y = 12
6) 3x – y = – 4
2x + y = – 1
7) 2x – y = – 7
4x – 4y = – 12
KEY
1) (2, 3)
2(– 3, – 3)
8) (1 , – 3)
9) (5, – 3)
3) (1 , 0)
8) 10x + 2y = 4
2x – 5y = 17
4) (4, 2)
5) x + 2y = 4
x + 6y = – 12
9) 6x – 5y = – 15
x – 3y = 14
5) (6, – 1)
6) (– 1, – 1)
7) (– 4, – 1)