1. Constructing Equations
Example
I think of a number, double it and the answer is 14.
What was the number I was thinking of?

2. Example
I think of a number, double it and then add 3. The answer is 11. What was the number I was thinking of?

3. Example
I think of a number, multiply it by 4 and then subtract 7. The answer is 9. What number was I thinking of?

4. The perimeter of the rectangle below is 34 cm. Find its width
Example
The perimeter of the rectangle below is 34 cm. Find its width
12 cm

5. The perimeter of the shape below is 43 cm. Find the value of x.
Example
The perimeter of the shape below is 43 cm. Find the value of x.
x + 2 6 x
x + 5

6. Example
If I double a number and then add 7, I get the same answer as when I add 10 to the number.
What is the number?

7. Example
If I multiply a number by 4 and then add 5, I get the same answer as when I double the number and add 11.
What was the number?

8. Example

9. Example

10. Example

11. Example