Solve a system of equation using Elimination (Day 2)
Presentation
•
Mathematics
•
8th - 9th Grade
•
Hard
Standards-aligned
Ms. Parsons
Used 1+ times
FREE Resource
3 Slides • 5 Questions
1
Solve a system of equation using Elimination (Day 2)
by Kristin Parsons
2
Multiple Choice
To solve a system of equation using the Elimination method, you first need to line up the equations so the matching terms are in the same order.
The next step is to__________________?
Get the equation into slope-intercept form.
Get x or y by itself.
Look for the term with the same coefficient and add or subtract.
Substitute the expression in for either x or y.
I have no idea what the next step is.
3
Practice: Solve the System of equation using Elimination / Combination Method.
Look for the term with a coefficient are the same (1y)
2x + 5y = 17
6x – 5y = -9
Combine like terms to eliminate the y term.
Solve for x
Substitute the value for x into the original equation(s) to find the y value.
Enter the solution on the next slide. (x, y)
4
Fill in the Blanks
Type answer...
5
Multiple Choice
Solve the System of Equation
2x - 3y = 23
x + 3y = -20
(3, -7 2/3)
(1, -7)
x = 43
(-7, 1)
6
Multiple Choice
If I want to solve using Elimintion Method what might I do to eliminate the x terms?
2x + 8y = 6
5x + 20y = 15
Multiply the first equation by 5 and the second by 2 to change the x term to 10x for both.
Solve for x in one equation, then substitution the expression with y into the other equaiton
Multiply the y terms to a common multiple of 8 and 20.
Subtract the second equation from the first.
7
Example: Solve using Elimination Method, coefficients are not the same
7x - y = 19 -> 3(7x - y = 19) -> 21x - 3y = 57
2x - 3y = 19 -> -1 ( 2x - 3y= 19) -> -2x + 3y = -19
19x = 38 (divide both sides by 19)
x = 2
7(2) - y = 19
14 - y = 19
- y = 5
y = -5
(2, -5)
8
Fill in the Blanks
Type answer...
Solve a system of equation using Elimination (Day 2)
by Kristin Parsons
Show answer
Auto Play
Slide 1 / 8
SLIDE
Similar Resources on Wayground
6 questions
Factoring Quadratics
Presentation
•
7th - 9th Grade
7 questions
Estimating Square Roots
Presentation
•
7th - 9th Grade
7 questions
Slope from a Graph
Presentation
•
9th Grade
8 questions
Comparing Functions
Presentation
•
8th Grade
9 questions
Power to a Power Lesson
Presentation
•
8th - 10th Grade
9 questions
Math Check In
Presentation
•
8th Grade
7 questions
A.5A
Presentation
•
8th - 9th Grade
6 questions
Writing Equations
Presentation
•
8th Grade
Popular Resources on Wayground
24 questions
PBIS-HGMS Day 10
Quiz
•
6th - 8th Grade
10 questions
HCS SCI 03 Summer School Review 3
Quiz
•
3rd Grade
11 questions
Home Scope
Quiz
•
7th - 8th Grade
15 questions
HCS SCI 05 Summer School Assessment 3 Review
Quiz
•
5th Grade
35 questions
Lufkin Road Middle School Student Handbook & Policies Assessment
Quiz
•
7th Grade
18 questions
Geo 11.3 Area of Circles and Sectors
Quiz
•
9th - 11th Grade