V+w=7,v+w=1 can you save this problem using elimanation

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.

Is it greater than or less than7*3_9*2

Find y to the nearest hundreds place