Question

the teacher said,I have thought of a number. If you add 7 to 3 times the number,you get 31. what are the numbers

Answer 1

let the number be x
then , 3*x +7 = 31
3*x =31 - 7 ( transposing 7 to other side and changing sign)
x = 24/3
x = 8

Answer 2

Let the number be X

ATQ
If we add 7 to 3 times the number we will get 31

7+ 3 × the number = 31
7+ 3x = 31
3x= 31-7
3x= 24
X = 24/3
X = 8