The area of a rectangle is 12 square inches. the length is 5 more than twice the width. find the length and width

Since the equation for area of a rectangle is A = l×w, and the length is 5 more than twice the width, making it 2w + 5, you have to plug in the quantities.
A = l×w
12 = (2w+5)×w
12 = 2w²+5w
0 = 2w²+5w-12
0 = (2w-3)(w+4)
Since the width can't be a negative number, the answer is:
2w-3 = 0
2w = 3
w = 3/2
And now, since length is 2w+5, you plug in the value of the width into the equation.
2(3/2)+5
3+5
8