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Please help me I really need it fast thank you

Please help me I really need it fast thank you-example-1

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Explanation:

The length is 1m shorter than 4times the width which means

L=4w-1

perimetre= 38 is given

p=2(L)+2(W)

so we substitute 4w-1 that means

p=2(4w-1)+2(w)

38=8w-2+2w

38+2=8w+2w.....collecting like terms

40=10w........divide both side by 10

w=4

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