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julsineya [31]
3 years ago
13

mark can cleaN the house in 7 hours. when he cleans the same house with wend, it takes them 3 hours to clean the house. how long

would it rake wendy to clean the house by herself
Mathematics
2 answers:
nevsk [136]3 years ago
8 0

Answer:

4

Step-by-step explanation:

blondinia [14]3 years ago
7 0

Answer:5.25

Step-by-step explanation:

3(1/7 + 1/x) = 1

3([x + 7]/7x) = 1

3x + 21 = 7x

4x = 21

x = 21/4 OR 5.25

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