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.

\(x+3 x=120,000\)

\(4 x=120,000\)

\(x=120,000 \div 4=30,000\)

\(3 x=3(30,000)=\$ 90,000\)

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