How do I solve for X 2x - 7 = 9

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

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.

Asap! i'm not good math and i'm lost.