If three times Kathy's age is decreased by 36, the result is twice Kathy's age. How old is Kathy?

x = Kathy's age

3x - 36 = 2x {three times her age minus 36 equals twice her age}

-36 = -x {subtracted 3x from both sides}

x = 36 {divided both sides by -1}

3x - 36 = 2x {three times her age minus 36 equals twice her age}

-36 = -x {subtracted 3x from both sides}

x = 36 {divided both sides by -1}

**Kathy is 36***- Algebra House*