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Sergeeva-Olga [200]
3 years ago
14

Three-sevenths of a number is 21. Find the number

Mathematics
2 answers:
ruslelena [56]3 years ago
7 0
You can set up a proportion that looks like 3/7 = x/21. X being the number that you are trying to find. Seven goes into 21 three times. So multiply 3 also by that 3 to get 9. So three sevenths of twenty-one is 9.
Softa [21]3 years ago
6 0

Answer:

the answer is 49

Step-by-step explanation:

The question is asking what the original number is. So its not 9. If you do a inverse operation which is 2 divided by 3/7 you get 49. To check your work if you multiply 49 by 3/7 you get 21.

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FinnZ [79.3K]

Answer:

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3 0
3 years ago
What theorem is it using the choices ?
Law Incorporation [45]
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6 0
3 years ago
Read 2 more answers
Finish solving for x and y.
Elodia [21]

Answer:

x=6

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Step-by-step explanation:

3x=18, so when you divide 3x by 3 to get x alone, you also divide the other side and 18 divided by 3 is 6. now you know that x equals 6. then you plug x back into either equation to solve for y. I chose to plus into x-3y=3. it would read 6-3y=3. you then subtract 6 from both sides and get that -3y=-3. therefore when you divide both sides by -3, you get that y=1

7 0
3 years ago
What is the vertex of YVT<br><br>A- y<br>B- v<br>C-t<br>D-q
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Hope this helps ;)
8 0
3 years ago
X : (x + 3) = 2 : 3 <br> Work out the value of x
Rus_ich [418]

Step-by-step explanation:

x : (x + 3) = 2 : 3

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x = 6

3 0
3 years ago
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