Question 245058
W=L-3
2L+2W=84
2L+2(L-3)=84
2L+2L-6=84
4L=84+6
4L=90
L=90/4
L=22.5 ANS. FOR THE LENGTH.
W=22.5-3=19.5 ANS. FOR THE WIDTH.
PROOF:
2*22.5+2*19.5
45+39=84
84=84