Answer:
I=p/2-w
Step-by-step explanation:
our equation to find perimeter p, is l+w+l+w=p
or 2(l+w)=p
we want to find l, so we need to isolate l
2(l+w)/2=p/2
l+w=p/2
now we need to sub "w" from both sides to find "l"
l=w-w=p/2-w
l=p/2-w
hope this helps! if it does plz vote my answer the brainiest!
thanks