How do you isolate the variable in 3x=9

Jaxon has s packs of 8 crazy straws. he divided the crazy straws into 2 equal bags. now, he has 224 crazy straws in each bag. how many packs of crazy straws did jaxon start with?

Marshall went to the state fair and bought 3 tickets. each ticket to the fair cost x dollars. after he bought the tickets, he had $3.25 left in change. write an expression that represents the amount of money, in dollars, that marshall had before he bought the tickets. n

Solve for x. 5(х – 10) = 30 — 15х x = 1 x = 4 х = 5 х = 8