Answer:
W=7 L= 16
Step-by-step explanation:
you start off with
P=2L+2W (the equation to find perimeter)
the equation gives you the perimeter = 46
so you plug that in
46=2L +2W
then it says the length IS (which also means equals) 9 plus the width
so you then get another equation:
L=9+W
you take that and plus it into the first equation/ substitute the new equation for L in the first equation
46=2(9+W)+2W
you solve that and get
w=7
you plus the 7 in for the w
L=9+7 = 1
W=7 L=16
