If $2x+3y = 4$ and $y = 34$, what is the value of $x$?
Since I already know $y = 34$, I can substitute that into the first equation and get $2x + 3(34) = 4$. Simplifying, I get $2x + 102 = 4$. Subtracting 102 from both sides, I get $2x = -98$. Dividing both sides by 2, I get $x = -49$. 