Steven has 18 peaches. Jake has 12 fewer peaches than Steven who has 8 more peaches than Jill. How many peaches does Jill have?
Let's denote the number of peaches that Jill has as $x$. 

Then, we know that: 

$x + 8 = 18$

$x + 12 = 18 - 8$

$x = 18 - 8 - 12$

$x = -2$

This is not a possible answer, because we are dealing with peaches, which are physical objects and therefore cannot be negative. 

The only other possibility is that we have made a mistake in our calculations. Let's check. 

$18 + 12 = 30$

$18 + 8 = 26$

$30 - 26 = 4$

This is the correct answer.