A landlord owns 3 condominiums, a 1-bedroom condo, a 2-bedroom condo, and a 3-bedroom condo. The total rent she receives is $1240. She needs to make repairs on the condos, and it takes
10% of the 1-bedroom condo’s rent for its repairs, 20 % of the 2-bedroom condo’s rent for its
repairs, and 30% of the 3-bedroom condo’s rent for its repairs. The total repair bill was $276.
The 3-bedroom condo’s rent is twice the 1-bedroom condo’s rent. How much is the rent for all
three condos?