How do you solve those type of exercises ? ex:
3x + 50 = 5x
i really need some .

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.

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)