pls i needed soo much bro thank you ​

What is the value of x divided into y - z if x = 32, y = 4, and z = 2 3/4?

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

How many bananas are in a fruit bowl that has 200 total apples and bananas if there are 31 bananas for every 93 apples