Well this is a calculator paper ... the answer says 'Attempt to solve this numerically' so I thought there would be a way to solve this.
"Numerically" means like they show in the link. They're telling you to do this numerically because you can't
do this algebraically (that is, "exactly"). Numerical is the best you can do.
Have they taught you any particular methods to use for doing this numerically? The lesson at the link I gave you shows two ways. Would one of them maybe be okay by your teacher?