Question

1: i am thinking of a number. When it is increased by 7, it equals 21. what is my number

N = 28
N = 14
N = 7
N = 147

2: i am thinking of a number. It is multiplied by 9. The product is 27. What is my number

N = 36
N = 18
N = 3
N = 4

3: Translate the following sentence into an equation. Then solve the equation
The difference of a number and 7 an 21

21 - 7 = n; n =14

n + 7 = 21 ; n=14

n + = 21 ; n = 28

21 - 7 = n; n =14

Answer 1

1. n = 14

2. n = 3

3. n - 7 = 21; n = 28

Answer 2

N = 14

Explanation:

Let the number be N. Then:

N + 7 = 21

Now solve this equation for N:

Subtract 7 from both sides. We get:

N = 14