SOLUTION: x/7=3/21 find the missing variable

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Question 392534: x/7=3/21
find the missing variable
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
x/7=3/21
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Multiply both sides by 21 to get:
3x = 3
Divide by 3 to get:
x = 1
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Cheers,
Stan H.