# A house and a lot cost $$\120,000$$. If the house cost three times as much as the lot, how much did the house cost?

$$\ 90,000$$

Explanation

Let x = cost of lot and 3x = cost of house.
$$x+3 x=120,000$$
$$4 x=120,000$$
$$x=120,000 \div 4=30,000$$
$$3 x=3(30,000)=\ 90,000$$