Multi-step Equations
Presentation
•
Mathematics
•
8th Grade
•
Practice Problem
•
Medium
Standards-aligned
Brandon Smith
Used 15+ times
FREE Resource
11 Slides • 5 Questions
1
Multi-step Equations
2
5x + 9 - x = 13
3
Multiple Choice
In the equation, 5x + 9 - x = 13, what are your variable terms?
9 and 13
5x and - x
5x and x
13 and -9
4
Multiple Choice
In the equation, 5x + 9 - x = 13, what are your constants?
5x and - x
9
13
9 and 13
5
Remember, variable terms go on the left and constants go on the right.
6
In the equation, 5x + 9 - x = 13, all of your variable terms are on the left already.
We NEED to move the constants.
7
Multiple Choice
Once we have the variable terms and constants on the right, what will the equation 5x + 9 - x = 13 look like?
5x + x = 13 + 9
5x - x = 13 + 9
5x = 13 - 9 + x
5x - x = 13 - 9
8
Your equation should look like...
5x + 9 - x = 13
5x - x = 13 - 9
9
Once we everything is on it's correct side, combine like terms.
Combine the variable terms on the left.
Combine the constants on the right.
10
Multiple Choice
Combine the like terms.
5x - x = 13 - 9 becomes....
4x = 4
6x = 22
6x = 4
4x = 22
11
5x + 9 - x = 13
5x - x = 13 - 9
4x = 4
12
Multiple Choice
The last step is to isolate the variable.
4x = 4
What is the value of x?
x = 4
x = - 4
x = 1
x = 16
13
Your equation should look like...
5x + 9 - x = 13
5x - x = 13 - 9
4x = 4
x = 1
14
15
As we said yesterday, solving a multi-step equation, is exactly like solving a 2 step equation. 5x + 9 - x = 13
Variable terms on the left. Constants on the right. 5x - x = 13 - 9
Combine like terms. 4x = 4
Isolate the variable. x = 1
16
5 (y - 1) = 40
5y - 5 = 40
5y = 40 + 5
5y = 45
y = 9
Multi-step Equations
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