Question 212505
L=2W-7
2L+2W=40
2(2W-7)+2W=40
4W-14+2W=40
6W=40+14
6W=54
W=54/6
W=9 ANS. FOR THE WIDTH.
L=2*9-7
L=18-7
L=11 ANS. FOR THE LENGTH.
PROOF:
2*11+2*9=40
22+18=40
40=40