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Equations

- One and two step equations

Instructions for use

- There are 8 worked examples shown in this

PowerPoint plus additional graded exercises. - A red dot will appear top right of screen to

proceed to the next slide. - You can either click on the navigation bar to the

left of screen to go straight to one of the

worked examples or use the buttons below.

Golden rule

Think of the equation as having two sides. The

left hand side (LHS) and the right hand side

(RHS).

- What you do to
- one side of an
- equation you
- must do to the
- other side.

LHS

RHS

The equals sign separates the two sides of the

equation.

1 step or 2 steps?

An equation is described as 2 step if two

operations are required to find the solution.

An equation is described as 1 step if one

operation is required to find the solution.

QuestionSolve the equation x 4 7

Method

x 4 7

Start by writing the equation.

Step 1 Subtract 4 from both sides of the equation.

x 4 7

? 4 ? 4

? x 3

Finish off by simplifying your answer.

QuestionSolve the equation x ? 4 7

Method

x ? 4 7

Start by writing the equation.

Step 1 Add 4 to both sides of the equation.

x ? 4 7

4 4

? x 11

Finish off by simplifying your answer.

QuestionSolve the equation 4x 12

Method

Start by writing the equation.

4 x 12

Step 1 Divide both sides of the equation by 4.

Finish off by simplifying your answer.

QuestionSolve the equation

ss

Method

Start by writing the equation.

Step 1 Multiply both sides of the equation by 5.

Finish off by simplifying your answer.

QuestionSolve the equation 2 x 1 7

Method

Step 1 Subtract 1 from both sides of the

equation and simplify.

?1 ?1

Step 2 Divide both sides of the equation by 2

and simplify.

Check your solution 2 ? 3 1 7

QuestionSolve the equation 3 x ? 1 5

Method

Step 1 Add 1 to both sides of the equation and

simplify.

1

1

Step 2 Divide both sides of the equation by 3

and simplify.

Check your solution 3 ? 2 ? 1 5

QuestionSolve the equation

Method

Step 1 Add 1 to both sides of the equation and

simplify.

1

1

Step 2 Multiply both sides of the equation by 2

and simplify.

2 ?

? 2

QuestionSolve the equation

Method

Step 1 Subtract 4 from both sides of the

equation and simplify.

?4

?4

Step 2 Multiply both sides of the equation by 3

and simplify.

3 ?

? 3

Last slide

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slides or to go to the graded exercises.