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Solving One-Step Equations
Word List
variabletermexpressioncoefficientequationalgebra
Types of Equations
Addition x + 5 = 15
Subtraction n – 3 = 7
Multiplication 2x = 14
Division n = 65
Inverse Operations
To solve equations we use inverse operations.
Operation Inverse
Addition Subtraction
Subtraction Addition
Multiplication Division
Division Multiplication
Solving addition equations
x + 3 = 9 What type of equation is this?
What inverse operation
should you use?
x + 3 = 9- -3= 3
Subtract 3 from both
sides of the
equation
x = 6
Solving subtraction equations
x - 8 = 12 What type of equation is this?
What inverse operation
should you use?
x - 8 = 12 + 8 =
+8
Add 8 to both
sides of the
equation
x = 20
Practice Problems
1) m – 4 = 92) 12 = s – 33) x – 7 = 214) 15 = r - 5
Model magic
Solving equationsIs all aboutBALANCE
x +++
+++++
++
x =
x++
+++
+
++
x =
USE EACH KEY TO WRITE THE EQUATION REPRESENTED BY EACH PICTURE. THEN, SOLVE EACH EQUATION
What equation is modeled?
= x
=1
Example:
= x
=1
= x
=1
= x
=1
= x
=1
Four in a Row
FIND THE EQUATION BEING MODELED
= x
= 1
Key
= x
= 1
Key
= x
= 1
Key