1. Bellringer 11.28.17 Go Formative & Graph this system: 𝑥+𝑦=−3
𝑦=− 1 3 𝑥+1
Learning Target
I can solve a system of equations algebraically by substitution.

2. Bellringer 11.28.17 Go Formative & Graph this system: 𝑥+𝑦=−3
𝑦=− 1 3 𝑥+1
Learning Target
I can solve a system of equations algebraically by substitution.

3. 2nd Block only
Please have your homeroom follow the link titled "Superlatives" on my NMS Website. It is at the bottom right hand corner of the teacher page. This form should not take long as I only need a name in each answer box.

5. Agenda Music Video-Solve by Substitution
Substitution-GOFO Identify SUBS
Post-it Practice at Table
SOLO Practice (Go Formative page 2 & IXL AA.8)

6. Identify your subs! EX

7. (4x) (x+7) tution Ex1 Post-it 2x+ =36 Substi- tution note Equ1:
2x+y=36
Equ2:
y= 4x
tution
note
(4x)
2x =36
(x+7)
Ex1

8. (4x) tution Ex1 Post-it 2x+ =36 Substi- tution note Equ1: 2x+y=36
y= 4x
(4x)
2x =36

9. (x+7) (x+7) tution Ex2 Distribute!!! Post-it 2x+3 =31 Substi- tution
Equ1:
2x+3y=31
Equ2:
y= x+7
tution
note
(x+7)
2x =31
(x+7)
Ex2
Distribute!!!

10. (x+7) (x+7) Post-it note Substi- tution #2 2x + 3y = 31 y=x+7

11. Post-it
note
Substi-
tution
2x = 31
(x+7)

12. (x+7) Post-it note Substi- tution 2x + 3 = 31 2x + 3x+21 = 31

13. Post-it
note
Substi-
tution
(x+7)
Solve for y y=
x = 2
y=(2+7)
y=9

14. Post-it note Substi- tution #1 Solution Check (2,9) y=x+7 (9)=(2)+7
2x + 3y = 31
(9)=(2)+7
9=9
True
2(2) +3(9)= 31
4+27= 31
31= 31
True

15. Post-it
note
Substi-
tution #3
2c-d= -2
d=-4c+20
(-4c+20)
(?)

16. Post-it
note
Substi-
tution #3
2c-d= -2
d=-4c+20
(?)

17. Post-it note Substi- tution #3 2c-d= -2 d=-4c+20 2c- = -2

18. Post-it
note
Substi-
tution #3
Solution Check (3,8)
2c-d= -2
d=-4c+20
8=-4(3)+20
8=-12+20
8=8
True
2(3) –(8)= -2
6–8= -2
-2= -2
True

19. Team Solve with Post-Its, write solution for each in comp book
for me to check.
1. y = x and 3x + y = 4 Sol (1,1)
2. x = y + 5 and 2x + 2y = -2 Sol (2,-3)
3. y = 3x and 2x + y = 15 Sol (3,9)

21. Go Formative Practice
Solving Systems of Equations by Substitution page 2 Show work on separate paper to be turned in. (not comp book) If you finish GOFO early, work on IXL AA.8 & AA.1 90% both.

22. Each table will work together to create a GIF
demonstrating how to solve a system by
Substitution. Use the system on the card given
To your team and capture
a picture for each part of
the solution. Use GIF maker app
on iPad or iPhone to record.
Roles:
Photographer
Writer
Post-it Mover
Time Manager