September 15, 2014
Objective: To solve a system of equations using the substitution method
Substitution
Steps to solve systems by substitution:
Solve the following systems of equations using the substitution method:
Ex. 1
2x + 5y = -5
x + 3y = 3
Ex. 2)
3x + 4y = -2
5x + y = -9
September 15, 2014
Ex 3)
3x + 3y = -15
5x - 9y = 3
Ex 4)
-3x - 3y = -6
y
2
Ex. 5) x = 3y - 8
4y + 9 = x
Ex 6)
=1-
x
2
x - 2y = 4
3x - 6y= 8
September 15, 2014
Ex 7) y - 2x = 8
2
Ex 8) y = x - 4
2
y - 32 = x + 12x
y = -3
September 15, 2014
Assignment: Worksheet #2