SOLUTION: How many years old is a person if her age now is equal to her age in 3 years time * 3, less 3 times her age 3 years ago?

Hi

Let x represent her age NOW

Question states***Write as we Read

 x = 3(x+3) - 3(x-3)

solving for x

 x = 3x+9 - 3x + 9

 x = 18, her age NOW



CHECKING our Answer***

  18 = 3*21 - 3* 15 = 63 - 45