How would you do this problem?:

The length is 3 more than the width. The perimeter of the figure is less than 52. Put this in an equation, solve the equation, and describe the dimension.

L = 3 + w

2 (L+w) < 52. Substitute the first equation into inequality

2 (3 + w + w) < 52

2 (3+2w) < 52 Divide both sides by 2

3 + 2w < 26

2w < 26-3

2w < 23

w < 23/2

w < 11.5

Recall, L = 3+w.

w < 11.5 Add 3 to both sides.

w+3 < 11.5 + 3

L < 14.5.

The width is less than 11.5, and the length is less than 14.5.