Question

Grace thought of a number, added 7, multiplied by 3, took away 5 and divided by 4 to give an answer of 7. What was the starting number?

Answer 1

Answer:

4

Step-by-step explanation:

Let the no. be x.

[{(x + 7) × 3} - 5] ÷ 4 = 7

[{3x + 21} - 5] ÷ 4 = 7

[3x + 16] ÷ 4 = 7

3x + 16 = 28

3x = 12

x = 4