Question

one number is three times of another number.i f 15 is added to both tha number, then one of the new number become twice the the other new number

Answer 1

let the number be x
and let the another number be 3x
by condition,
2(x+15)=3x+15
=2x+30=3x+15
=2x-3x=15-30
=x= -15
so, the number is -15
and the another number is 3x
that is 45