Question

I think of a number. I add 7 to it and then divided it by 10 . My answer is 3.8. What number did I start with ?

Answer 1

your final ans were is 38

so we go reverse

we multiply 3.8×10

38,and now 7 subtracted from 38 so the number is31

Answer 2

answer ,18

1. $8 - 6 = 2$