# Checking the solution of simultaneous equations

In this lesson, we will learn to check the solutions to simultaneous equations by a method of substitution.

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Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Let p be the number of protractors bought. If each protractor costs £2, which of the following represents the total amount spent on protractors (in pounds)?

1/5

Q2.Let p be the cost of a protractor. If I buy 3 protractors, which of the following represents the total cost?

2/5

Q3.Let p be the number of protractors bought and q be the number of rulers bought. Protractors cost 20 pence and rulers cost 15 pence each. What does 15q represent?

3/5

Q4.Let p be the number of protractors bought and q be the number of rulers bought. Protractors cost 20 pence and rulers cost 15 pence each. What does p+q represent?

4/5

Q5.Let p be the number of protractors bought and q be the number of rulers bought. Protractors cost 20 pence and rulers cost 15 pence each. What does 20p+15q represent?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Let p be the number of protractors bought. If each protractor costs £2, which of the following represents the total amount spent on protractors (in pounds)?

1/5

Q2.Let p be the cost of a protractor. If I buy 3 protractors, which of the following represents the total cost?

2/5

Q3.Let p be the number of protractors bought and q be the number of rulers bought. Protractors cost 20 pence and rulers cost 15 pence each. What does 15q represent?

3/5

Q4.Let p be the number of protractors bought and q be the number of rulers bought. Protractors cost 20 pence and rulers cost 15 pence each. What does p+q represent?

4/5

Q5.Let p be the number of protractors bought and q be the number of rulers bought. Protractors cost 20 pence and rulers cost 15 pence each. What does 20p+15q represent?

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Checking the solutions of simultaneous equations

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.If x=2 and y=3, what is the value of 2x+3y?

1/5

Q2.Is x=3 the solution to 2x+7=13?

2/5

Q3.Use substitution to decide which of the following are solutions to x+y=3.

3/5

Q4.Use substitution to decide which of the following is the solution to x+y=3 and 3x+4y=10.

4/5

Q5.Use substitution to decide which of the following is the solution to x+y=3 and 5y+3x=15.

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Checking the solutions of simultaneous equations

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.If x=2 and y=3, what is the value of 2x+3y?

1/5

Q2.Is x=3 the solution to 2x+7=13?

2/5

Q3.Use substitution to decide which of the following are solutions to x+y=3.

3/5

Q4.Use substitution to decide which of the following is the solution to x+y=3 and 3x+4y=10.

4/5

Q5.Use substitution to decide which of the following is the solution to x+y=3 and 5y+3x=15.

5/5

# Lesson summary: Checking the solution of simultaneous equations

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## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance