SOLUTION: the length of a rectangle is three more than the midth. if the perimeter is 50, what are the length and width?

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Question 577934: the length of a rectangle is three more than the midth. if the perimeter is 50, what are the length and width?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+P+=+2W+%2B+2L+
given:
+L+=+W+%2B+3+
+P+=+50+
------------
+2W+%2B+2L+=+50+
By substitution:
+2W+%2B+2%2A%28+W+%2B+3+%29+=+50+
+2W+%2B+2W+%2B+6+=+50+
+4W+=+50+-+6+
+4W+=+44+
+W+=+11+
and
+L+=+W+%2B+3+
+L+=+11+%2B+3+
+L+=+14+
The rectangle is 11 x 14
check:
+P+=+2W+%2B+2L+
+50+=+2%2A11+%2B+2%2A14+
+50+=+22+%2B+28+
+50+=+50+
OK