if the perimeter of some traffic sign must be 84 inches and its length is 8 inches longer than its width find the dimensions of the sign
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Let the width be x
This makes the length ( x + 8 )
the perimeter is found by 2 * ( length + breadth )
So it is 2 * ( x + x + 8 )
this is 2 * ( 2x + 8 )
which is 4x + 16
this is equal to 84
So 4x + 16 = 84
so 4x = 68
therefore x = 17
x + 8 = 25
therefore the dimensions ate 17 inches by 25 inches
The width is 17 inches
The length is 25 inches
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