Lesson 1.9: Solving Two-Step Equations

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Lesson 1.9 Solving Two-Step Equations

• Standard AF 4.1
• Objective Solve equations using two steps

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Objective - To solve equations involving two
steps.
3x 4 16
Hard way
Easy way
3x 4 16
3x 4 16
- Undo Multiplication or Division first
- Undo Addition or Subtraction first
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Hard way
Easy way
- Undo Mult./ Div. first
- Undo Add./ Subt. first
3x 4 16
3x 4 16
-4 -4
3
3
3x 12
3x
4
16


3
3
3
3
3
4
16
x 4
x


3
3
4
4
-
-
3
3
12
x

3
x
4

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Rules for Transforming Equations
1) Goal
Isolate the variable on one side of the
equation. ISOLATE
2) Always perform the same operation to both
sides of an equation. BALANCE
3) To undo an operation, perform its opposite
operation to both sides of the equation. INVERSE
OPERATION
5
Solve the following equations.
6
Translate the sentence below and solve.
6) Five less than the quotient of x and 2 is 37.
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Quick Draw for Points!

• Who is the best at showing their work?
• The text is TWO STEP EQUATIONS
• You will have 30-60 seconds for each problem.
• Are you ready to prove yourself?

8
Solve the following equations.
9
Translate the sentence below and solve.
5) Eight more than 3 times a number y is the same
as 29.