# Multi-Line Problems

Sometimes, when you type an equation, Zoom Math won’t do anything. For example, if you type x+2y=7, then when you press Enter, Zoom Math will just go on to the next line.

Zoom Math doesn’t give you an answer yet, because Zoom Math doesn’t know what you are asking yet. Do you want to solve the equation for y? Do you want to graph the equation? Do you want to solve a system of equations?

So, on the next line, just type whatever you’re asking for. If you want to solve the equation for y, type y on the next line. If you want to graph the equation, press the Graph key. If you want to solve a system of equations, type the second equation on the next line.

For example, suppose you want to solve this system of equations:

$x+2y=7$

$3x-y=0$

Just type the first equation and press Enter or Trace, and then type the second equation and press Enter or Trace.

Similarly, if you type f(x)=3x+2 in Zoom 300 or above, then when you press Enter, Zoom Math will just go on to the next line; it doesn’t know what you are asking yet. So, on the next line, just type whatever you’re asking for. If you want to calculate $f(4)$, type f(4) on the next line. If you want to graph the function, press the Graph key. If you want to calculate the inverse function of $x$, type f^-1(x) on the next line.