The perimeter of a rectangle is 24 in. and its length l l is 3 times the width w w . what is the length and width \left(l, w\right) ( l , w ) of the rectangle?

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it