Please help its due at 11 am​

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.

Can someone me find the original price? the discount is 5% and the sale price is $68.40