A book is on sale at a 30% discount. If the sales price is $28, what was the original price?
Charles is going to buy 3 computer tables for $390. If he pays the same rate, how much would it cost for 8 computer tables?
pls answers all, i have more questions up owo owo, i already had two people take 50 and 100 points from me and got it wrong so yuh if I get the ones you answered wrong yknow im reportin you.
(i have a 65% cus of those two people so owo i can retake it but this is my last try)

A book is on sale at a 30% discount. If the sales price is $28, what was the original price?

Original - discount = sale

    x       - 30% of x = $28

    1x      - 0.3x        = $28

           0.7x            = $28

             x                = $28 ÷ 0.7

             x                = $40

Charles is going to buy 3 computer tables for $390. If he pays the same rate, how much would it cost for 8 computer tables?

$390 ÷ 3 = $130 per computer table.

8 × $130 = $1040

If my first one is wrong, feel free to ask for clarification