How to solve simultaneous equations involving fractions

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

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Witch represents the inverse of the function f(x)=1/4x-12