Urgent!

i was solving the algebra problem:
if r(x) = -2x - 2, find the value of x if r(x) = 4.
and came up with the number -2 as x. is this correct?

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?

Complete the steps to find 4.830 ÷ 5