Algebra 1 - Mr. Coffey
www.usd443.org/webpages/jcoffey
Class: Algebra 1
Learning The scholar will demonstrate the
ability to solve systems of
Goal:
equations using the substitution
method by completing
independent practice.
Questions/
Main Idea
Name:
Day: 7
Block:
Vocabulary:
Notes:
Substitution:
What is it?
Step 1: Solve one equation for _____ or _____.
STEPS TO
SOLVE
Step 2: ____________________ this expression into the other equation and
_______________ for the variable.
Step 3: ____________________ your answer into the revised equation from
Step 1 and _______________ for the other variable.
y = 6x
2x + 3y = -20
y=x-3
6x + 2y = -14
Summary:
Algebra 1 - Mr. Coffey
www.usd443.org/webpages/jcoffey
QUESTIONS:
2x + 4y = -14
y=x-8
y = 2x + 2
5x - 6y = 2
y = 2x
5x + y = -21
-5x + 6y = 7
y=x+2
8x - 5y = 9
y = 2x - 1
Summary:
NOTES: