In 15 years, a child's age will be 9 years less than four times her current age. Find her current age.

**x = child's age now**

x + 15 = child's age in 15 years

x + 15 = child's age in 15 years

x + 15 = 4x - 9 {in 15 years she will be 9 less than 4 times her age now}

15 = 3x - 9 {subtracted x from each side}

24 = 3x {added 9 to each side}

x = 8 {divided each side by 3}

her current age is

**8**

*- Algebra House*