Free points for who ever answears

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

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

Which of the following is the result of expanding the series