Need help
problem/question in image below ​

Deshawn uses 3/4 of a box of rice to cook dinner the portion he uses weighs 12 ounces right and solve an equation to find the weight of the full box of rice

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.