Originally Posted by

**HKarl** *John is 20 years older than Steve. In 10 years, Steve's age will be half that of John's. What is Steve's age?*

I'm having trouble using two variables to setup and solve this problem. I first translated the problem into two equations using *j* for John and *s* for Steve:

*John is 20 years older than Steve*

j = 20 + s

*In 10 years, Steve's age will be half of John's.*

s + 10 = 1/2j

Since I already know what j is from the first equation, I plug that into the second equation but it doesn't work. Why? This is driving me nuts.