From the sum of 2x+8 and x-13 subtract 4x-3

Icould really use some with this question.

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

Anita has a success rate of 80% on free throws in basketball. she wants to know the estimated probability that she can make exactly four of five free throws in her next game. how can she simulate this scenario? categorize each simulation of this scenario as correct or incorrect.