Help pls easy 5th grade math

Every time you drive you will experience a combination of driving conditions and environments.

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Solve 3x-18=2y and 5x-6y=6 by elimination show work