Ofelia has a certain amount of money. if she spends $12 then she has 1/5 of the original amount left. how much money did ofelia have originally?

Can someone check my answer? you : )

Which fraction is not equivalent to 8/12 a. 2/3 b. 24/36 c. 4/10 d. 6/10

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?