CEMC Galois, 2010

Algebra Difficulty 1.0 Junior Prove it Canada

Emily's old showerhead used $18$ L of water per minute. She installs a new showerhead that uses $13$ L per minute. When Emily takes a bath, she uses $260$ L of water. Using the new showerhead, what length of shower, in minutes, uses $260$ L of water?

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