Test 1 Section 3 number 18. Thanks

I love this question—it’s a great argument for making the elimination method of solving linear systems a major part of your SAT approach. The question asks you for *x*, but the fastest way to get *x* is to solve for *y* first.

See how there’s an *x* in each equation? That means that you can eliminate *x* by subtracting the equations from each other.

Of course, once you know that *y* = –16, it’s easy to plug back into the first equation to solve for *x*.