SOLUTION: The length of a rectangle is 2.1cm more than 4 times the width. If the perimeter of the rectangle is 70.2cm, what are its dimensions?

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Question 1010779: The length of a rectangle is 2.1cm more than 4 times the width. If the perimeter of the rectangle is 70.2cm, what are its dimensions?
Answer by addingup(3677) About Me  (Show Source):
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L= 4W+2.1
2L+2W= 70.2 Substitute for L
2(4W+2.1)+2W= 70.2
8W+4.2+2W= 70.2
10W= 66
W= 6.6 And L:
4W+2.1= 4(6.6)+2.1= 28.5
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Check:
2(28.5)+2(6.6)= 70.2
57+13.2= 70.2
70.2= 70.2 We have the correct answer.