Question

take a number and add 7 to it.multiply the result by 7 and you get 21.Find the number​

Answer 1

Step-by-step explanation:

Let the no. be x

According to the given condition

:. (x+7)×7=21

x+7=21/7

x=3-7

x=-4

by checking the ans (not necessary)

(-4+7)×7=21

3×7=21

21=21

:. The solution of the question -4