Question

The length of a rectangle is one less then 2 times the width. The area of the rectangle is 15 square inches. Find the length and width of this rectangle

Answer 1

So you know the area=length x width
and you know the length is one less than two times the width
so let the width=w
and length =L
so L=2w-1

So area = L x W = (2w-1) x w = 15
so 2w^2-w=15
rearrange and solve for w (ie the with)
and then substitute in the find the length