What is 2x3 can't get it

Ineed asap. i cant understand this question i need someone to me right away

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top