Question

when i triple a certain number and add 2, i get the same answer as i do when i subtract the number from 50.find the number?

Answer 1

let that number be N

3 N + 2  =  50 - N

4 N = 48

N = 12

Answer 2

Let that certain number be x.
3x + 2 = 50 - x
3x + x = 50 - 2
4x = 48
x = 48/4
x = 12
That certain number is 12.