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BaLLatris [955]
3 years ago
12

a copy machine can copy a report in 30 min. when a second copy machine is used at the same time, the copying can be done in 18 m

in. how long would it take the second copy machine to do the copying alone?
Mathematics
1 answer:
Marta_Voda [28]3 years ago
4 0

Answer:

Step-by-step explanation:

A copy machine can copy a report in 30 mins. When a second copy machine is used at the same time, the copying can be sone in 18 min. How long would it take the second copu machine to do the copying alone?

i have:

x=30

x+y=18

that would be -12..not right?

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