Pls help on timer D:

Solve: 3x+y=6 4x-2y=18 show all work !

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30

Build is 120 wide 20 feet high 48 feet long how many cubic feet and the volume