How do you solve 39= 1 3/10b

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

X+ y = 5 ; x - y =3 solve using linear combination

Find the value of x. give reasons to justify your solutions! l, m ∈ kn