Question

If 5 is subracted from three times a number, the result is 16. Find the number?

Answer 1

3x - 5=16
=> 3x =16+5
=> x=21
----
3
=>x=7

Answer 2

Let the number be x

so by the condition given in your question we get equation

3x-5=16

3x=16+5

3x=21

x=21/3

x =7

so the number is 7