1. Lesson 6­3.notebook
November 15, 2013
Assignment:
1­­>L6.3, pg. 351­352, #1­22 all ­ Due Monday (11/18)
2­­>Chapter 5 Test signed for Extra Credit

2. Lesson 6­3.notebook
Lesson 6.3 WarmUp:
Graph the following equations.
1) y ­ 1/3x = 2
2)
1/3x + 1/3y = 1
Solve the following systems of equations by graphing.
3) y = 6x + 6
y = 3x + 6
4)
y = 1/2x
x + y = 3
5)
y = 2x + 3
3y = 6x ­ 6
November 15, 2013

3. Lesson 6­3.notebook
November 15, 2013
Lesson 6.3:
*ANOTHER way to solve a linear system is by using ELIMINATION.
*Steps:
­write the system so that "like" terms are aligned
­add or subtract the equations, eliminating one variable. Then
solve for the remaining variable
­substitute the value from step 2 into one of the equations and
solve for the other variable
­write the solution as an ordered pair

4. Lesson 6­3.notebook
Lesson 6.3 examples:
Use elimination to solve each system of equations.
A) 4x + 6y = 32
3x ­ 6y = 3
B)
4y + 3x = 22
3x ­ 4y = 14
November 15, 2013

5. Lesson 6­3.notebook
**Sometimes we can eliminate one variable by "subtracting" one
equation from the other one...
C) 8b + 3c = 11
8b + 7c = 7
D)
2t + 5r = 6
9r + 2t = 22
November 15, 2013

6. Lesson 6­3.notebook
E)
­3 times a number plus 5 times another number is ­11. 3 times
the first number plus 7 times the other number is ­1. Find each
number.
November 15, 2013