Year 8
Year 8
Forming and solving equations from descriptions
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Lesson details
Key learning points
- In this lesson, we will form linear equations from worded descriptions, and then solve them.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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4 Questions
Q1.
Which equation can be formed from the diagram?
2c + 30 = 60
c + 60 = c + 30
c + c + 30 + 60
Q2.
Work out the value of c.
c = 30
c = 60
c = 90
Q3.
Which equation can be formed from the diagram?
5b + 22 = 2b + 51
7b + 73 = 180
7b = 73
Q4.
What is the size of the largest angle?
133 degrees
215 degrees
360 degrees
41 degrees
82 degrees
Others
5 Questions
Q1.
I think of a number. I times it by 5 and subtract 3. The answer is 17. Form an equation to show this.
5 - 3x = 17
5a - 17 = 3
5a + 3 = 17
Q2.
What number was I thinking of in Question 1?
1
2
3
5
Q3.
Zaki thinks of a number. He multiplies the number by 5. He then adds 3. His answer is 38. What number did Zaki think of?
3
4
5
6
Q4.
Yasmin thinks of a number. She multiplies it by 2. She then subtracts 15. She then divides the result by 4. Her answer is 2.5. What number did Yasmin think of?
10
25
5
Q5.
2 bottles and 2 corks cost £4.20. A bottle is £0.80 more expensive than a cork. How much does a bottle cost?
£0.65
£2.10
£3.40