1. 6-2 Substitution Again Goals: Solve linear systems using substitution
Interpret solutions to special problems
Eligible Content:
A / A

2. Practice
Complete worksheet – “Monstrous Mammal”

3. Special Problems No solution Many solutions
There is no point in common
All variables will cancel out
You will be left with a false statement: 4 = 12
Many solutions
There are many points in common
You will be left with a true statement: 5 = 5

4. Examples 3x + y = –1 –9x – 3y = 3 many solutions x – 2y = 5
no solution
4x + 4y = –8
x + y = –2
many solutions
2x + y = –1
–6x – 3y = –15
no solution

5. Practice (not all problems are special)
x – 2y = 1
–2x + 4y = 10
x – 3y = –24
5x + 8y = –5
6x + y = 14
12x + 2y = 28
No solution (-9, 5) Many solutions

6. Homework
Page 347 #14-19