2.4 Lesson: Variables on Both Sides
Presentation
•
Mathematics
•
7th - 8th Grade
•
Practice Problem
•
Easy
Standards-aligned
Blake Jensen
Used 8+ times
FREE Resource
4 Slides • 6 Questions
1
By Blake Jensen with Credit to McGraw Hill
2
Match
Match each on to it's INVERSE OPERATION
Division
Addition
Subtraction
Multiplication
Multiplication
Subtraction
Addition
Division
Multiplication
Subtraction
Addition
Division
3
Match
Match what each operation is happening to the variable!
x + 3
y - 3
3b
3c
addition
Subtraction
Multiplication
Division
addition
Subtraction
Multiplication
Division
4
Reorder
In what order do we use inverse operations? 1 is the FIRST thing we have to UNDO
Addition and Subtraction
Multiplication and Division
Exponents
Parentheses
5
Remember the goal
Getting them on one side: Isolating the variable
Let's try this one write it down and on the next slide, we'll work it out together
2x - 14 = -5x + 7
6
1) Simplify if possible.
2) Use inverse operations to get all variables on one side.
3) Use inverse operation to isolate a variable
2x - 14 = -5x + 7
7
Math Response
Solve this one!
13x = 9x + 8
8
Math Response
And another one!
14x -21 = 17x
9
If there are multiple "like terms" combine them!
Let's try one!
5x + 11 - 3x = 8 + 4x - 3
10
Math Response
Solve the following: Write your answer as
a=
5 + 7a = 6a - 13 - 2a
By Blake Jensen with Credit to McGraw Hill
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