Independent Activity 2

Solve the following using working backward.

Write your answers in your notebook

1. )I think of a number and I divide it by 3 I multiply it to the sum of 4 and 5. The answer is 81. What is the number?

2. )The area of a rectangular garden is 15 square meters, if the length is 5 meters. What is the width?

3.) A number is added to 24 and subtracted by 5. The total is 50. Find the number.

4. )Joel drives 1 of the way to his office and still drives the remaining 9 kilometers 4 in the next few minutes. How far does he live from the office?

5.) I think of a number and multiplied it by 5 Then, I subtracted 4. The total is 26 What is the number?

Answer:

1. 27

2. 3

3. 31

4. 12

5. 6

Step-by-step explanation:

1. (n/3)(4+5) = 81

(n/3)(9) = 81

n/3 = 81 / 9

n = (81/9)(3)

n = 27

2. 5 x n = 15 , since area of a rectangle is Length x Width

5n = 15

n = 15/5

n = 3

3. (n + 24) - 5 = 50

n + 24 = 50 + 5

n + 24 = (50+5) - 24

n = 31

4. n = (1/4n) + 9

n - 1/4n = 9

3/4n = 9

n = 12

5. (n x 5) - 4 = 26

(5n) = 26 + 4

5n = 30

n = 30 / 5

n = 6