Solving Multi-Step Equations (Day 1)

1
Solving Multi-Step Equations (Day 1)

• We are learning towrite and solve equations
  which involve more than one step to solve.
• Wednesday, December 04, 2013

2
Introduction

• We have recently been simplifying expressions.
• Today we will be solving equations. What is the
  difference between an equation and an expression?
• Discuss with your group, write down some ideas
  and be ready to share with the class.

3
What is the difference between an equation and an
expression?

• Expressions are mathematical sentences with
  numbers and variables.
• Equations are two expressions which are set equal.

4
When Solving 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.

5
Solve the equation below
Record your steps
1
1
1
1
1
x
1
1
1
1
1
1

1
1
x
1
1
1
1
1
1
1
1
Check your work
1
1
1
1
1
6
Solve the equation below
Record your steps
1
1
1
1/3 y
1
1

1
1/3 y
y
1
1
1/3 y
1
Check your work
1
1
7
Solve the equation below
Record your steps
x
x
1
1
1
1
1
x
1
1
1
1
1

1
1
x
1
1
1
1
1
Check your work
1
x
1
1
1
1
8
When solving equations with more than one
operation

• Firsteliminate any addition or subtraction by
  creating zero pairs.
• Secondisolate the variable by either multiplying
  or dividing.
• Now try some practice with your group
• Use algebra tiles and your equation mat to
  represent each equation below.
• In the space provided, draw what the mat looks
  like.
• Solve for the variable.
• Record your work.
• Be sure to check your solution by using
  substitution.