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3 years ago

Sixteen is seven plus three time a number. Find the number

Mathematics

1 answer:

Amanda [17]3 years ago

6 0

Answer:

x=3

Step-by-step explanation:

16-7=9

9/3=3

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Answer:

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Step-by-step explanation:

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David can paint a fence in ten hours. Alex can paint the same fence in eight hours. If

xxTIMURxx [149]

Answer:

40/9

Step-by-step explanation:

Use the work formula, $\frac{1}{A}$ + $\frac{1}{B}$ = $\frac{1}{T}$ , where A is the amount of time it takes one person, B is the amount of time it takes another person, and T is the time it takes for them to work together.

Plug in the times for David and Alex alone:

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So, if they worked together, it would take them 40/9 hours

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