sandyyknguyen2155
21.11.2020 •
Mathematics
Wilma can mow a lawn in 60 minutes. Melissa can mow the same lawn in 30 minutes. How long does it take for both Wilma and Melissa to mow the lawn if they are working together?
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Ответ:
45
Step-by-step explanation:
60 and half of 60 is 30 and half of 30 is 15 so 30 +15 is 45
Ответ:
Add 2 to both sides
8x=-7+7x
Subtract 7x from both sides
x=-7