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Ilia_Sergeevich [38]
3 years ago
12

The lenght of a rectangle is 4 cm less than three times the width. the perimeter is 64 cm

Mathematics
2 answers:
dybincka [34]3 years ago
5 0
Let the width be x cm.
Then length=3x-4 cm.
Its perimeter is 64 cm.
We know that perimeter of a rectangle= 2(length+width)
So,
2(3x-4+x)=64
6x-8+2x=64
6x+2x=64+8
8x=72
x=9
Therefore,
length=(3×9-4)cm=(27-4)cm=23 cm.
Width=9 cm.
marusya05 [52]3 years ago
3 0
Let w be the width and l the length and 32 half of the perimeter
4-3w=32
-4        -4
--------------
-3w   =28
------   ------
  3         3

-1w     9 1/3
------    -------
  -1        -1
    w  = -9 1/3
The Width is -9 1/3 


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