Question

15Years from now renu will be four times her present age. What is renu present age

Answer 1

Let renus age be x
Therefore
15+x= 4x
15= 4x-x
15 = 3x
X= 15/3
X = 5 years ( answer)

Answer 2

4x+x=15
5x=15
x=15/5
x=3
15*3=45
45 yrs
hope it will help you