Alcohol is bad for u​

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

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

What is the result of adding the system of equations? 2x+y=4 3x-y=6