SOLUTION: Solve the proportion. x:21 = 1:3

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Question 939993: Solve the proportion. x:21 = 1:3
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+x%2F21+=+1%2F3+
Multiply top and bottom of
the right side by +7+
+x%2F21+=+%28+7%2F7+%29%2A%28+1%2F3+%29+
+x%2F21+=+7%2F21+
+x+=+7+
OK