angeles86
12.07.2019 •
Mathematics
The length of a rectangle is 5 meters less than 3 times the width. the perimeter is 54 meters. find the width.
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Ответ:
P= 2 (L + w)
P= 54
L = 3w - 5
54 = 2 (3w - 5 + w)
(Combine like terms)
54 = 2 (4w - 5)
(Distribute the 2)
54 = 8w - 10
(Add 10 to both sides)
64 = 8w
(Divide 8 from both sides)
W = 8m
( L = 8(3) - 5 = 19m)
Ответ: