2017­3­3 elimination day 2.notebook
March 03, 2017
Today is Fri.
3/3
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-Take out homework
-Take calculator
-Copy down homework
-Systems Review Sheet
-Quiz Tues. 3/7
-Extra help Tues @ 7:20
Warm up:
Solve the following system of linear equations using elimination
2x + y = 24
-4x - y = 2
Check
2017­3­3 elimination day 2.notebook
March 03, 2017
HW Answers
1)
- 2y = -12
{ -4x
4x + 8y = -24
6y = -36
6
6
y = -6
Solution: (
2)
,-6)
x - y = 11
{ 2x + y = 19
3x = 30
3
3
x = 10
Solution: ( 10 , )
Solve the following system by graphing
y=
=
-x
1
{ y = -x - 1
y
y = 3x - 5 b = -5
3x
-5
m=3
m = -1
b = -1
(1, -2)
Solution:_______
2017­3­3 elimination day 2.notebook
March 03, 2017
Today's Objective:
Solving systems by elimination (part 2)
What looks different about this system if we
wanted to use ELIMINATION?
2x + 7y = 1
2x - 4y = 12
2017­3­3 elimination day 2.notebook
March 03, 2017
Steps to solving systems by elimination (part 2)
Step 1: Multiply one or both equations by a
constant that results in an opposite term
Step 2: Add the two equations together
Step 3: Solve for the remaining variable
Step 4: Substitute to find the other variable
Step 5: Write the solution as an
ordered pair
Solve the following system of linear equations using elimination
3x + 6y = 9
3x + 5y = 8
2017­3­3 elimination day 2.notebook
March 03, 2017
Solve the following system of linear equations using elimination
6x + 5y = 50
6x - y = 26
Solve the following system of linear equations using elimination
2x + 5y = 16
-4x + 3y = 20
2017­3­3 elimination day 2.notebook
March 03, 2017
Solve the following system of linear equations using elimination
x + 4y = 1
3x + 5y = 10
CHALLENGE
Solve the following system of linear equations using elimination
-2x + 3y = 7
5x + 8y = -2
2017­3­3 elimination day 2.notebook
March 03, 2017