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the width of a rectangle is 7 cm less than twice its length. its area is 30 square cm. find the dimensions

Sagot :

Answer:

l = 6 cm

w = 5 cm

Step-by-step explanation:

l(2l - 7) = 30

2l^2 - 7l - 30

(2l + 5)(l - 6)

l = 6

2(6) - 7 = 5

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