Solve for y and find solution

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?