divide 72 in to two parts such that one part is three times the other part

Answer 1

Let x = part

x + 3x = 72

Solve for x, then 3x.

Answer 2

x+3x=72
4x=72
divide both sides by 4
x=18
for 3x
since x=18
then 3x will be
3(18)=54

Answer 3

45 and 30