If $x^2+x+4 = y - 4$ and $x = -7$, what is the value of $y$?
To solve for $y$, I need to plug in $x = -7$ into the equation and simplify. So I get $(-7)^2 + (-7) + 4 = y - 4$. Simplifying the left side, I get $49 - 7 + 4 = y - 4$. Combining like terms, I get $46 = y - 4$. To isolate $y$, I need to add $4$ to both sides. So I get $y = 50$. 