Question

The teacher said,"I have tought a number. If you add 7 to 3 times the number,you get 31. what number i have touhgt of?" can you answer the teacher's question?

Answer 1

the teacher thought of no. 8 
if u subtract 7 from 31 you get 24
divide 24 by 3 
and you get 8

Answer 2

let the number be x
A/Q
3x+7=31
3x=31-7

3x=24
x=8

hope it will be helpful to you..