Me to find what's the new sale price

If 3x+8=3x+8 is it one solution or no solution

Ill mark the brainliest if you me with the these three questions 7,8,9

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