Question

Thrice a number plus two times the same number eaquals 100.find the number

Answer 1

Let the no. be x
3x+2x=100
5x=100
X=100/5 = 20

Answer 2

let the number as x.
so, accprding to the question
                                                  
                3x+ 2x = 100
            so, 5x=100
                  x=100/5
                  x=20
; the number x is 20.