Question

if the thrice of a number is diminished by 5 the result is 13 more than number find the number

Answer 1

let the no. be x
3x-5=x+13
2x=18
x=9

Answer 2

Let the number be x
3x-5=13
3x=13+5
3x=18
.: x=18/3
=6
Hope you will like the answer.