One-Step Addition and Subtraction Equations

We are learning to…use inverse operations to solve for a variable in an equation.

Friday, April 21, 2023

Take the following Algebra Tiles out of your bag!

Trace each of these Algebra Tiles on your notes.

1 unit

x units

Area/Name:

“1 UNIT TILE”

Area/Name:

“-1 UNIT TILE”

1 unit

Area/Name:

“X TILE”

Area/Name:

“Y UNIT TILE”

y units

1 unit

Name each tile by its area.

1 unit

One-Step Addition and Subtraction Equations

The variables, x and y, represent missing values in our equations today.

Our job is to find the value of the variable by isolating the variable on one side of the equation.

Example #1

5 8x

=

Record your steps

mathematically:5 8x

5 5 8 5x 3x

Check your Solution:

3 5 8 8 8

Example #2

3 6y

=

Record your steps

mathematically:3 6y

3 3 6 3y 9y

Check your Solution:

9 3 6 6 6

Example #3

( 2) 5x

=

Record your steps

mathematically:( 2) 5x

( 2) 2 5 2x

3x Check your Solution:

3 ( 2) 5 5 5

Example #4

5 4y

=

Record your steps

mathematically:5 4y

5 5 4 5y 1y

Check your Solution:

1 5 4 4 4