Question 481316
Sara x years
Mark (3/5)x
Ron (2/3) * (3/5)x=(2x/5)

x= (2x/5)+9
x-2x/5 = 9
3x/5=9
3x=45
x= 15 Ron's age

Mark's age (3/5)x = (3/5)*15= 9 years