A rectangle has width w and its length is 2 units shorter that 3 times the width

what a simplified polynomial that represents the perimeter

2 (3w-2+w)

=2 (4w-2)

=8w-4

the formula for solving perimeters is 2 (WL). so L=3w-2, because the question said the length is 2 units shorter than 3 times the width, and the width is w. so the final equation is 2 (3w-2+w), and then you just have to simplify that