Which property of equality would be used to isolate the variable b in this equation? (3/4) b= 12

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

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.