SOLUTION: The sum of eleven and ten times a number is 221. What is the number?

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Question 947679: The sum of eleven and ten times a number is 221. What is the number?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let the unknown number = +x+
given:
+11+%2B+10x+=+221+
Subtract +11+ from both sides
+10x+=+221+-+11+
+10x+=+210+
Divide both sides by +10+
+x+=+21+
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check the answer:
+11+%2B+10x+=+221+
+11+%2B+10%2A21+=+221+
+11+%2B+210+=+221+
+221+=+221+
OK