Question 158252
L=2W+10
W=W
2(2W+10)+2W=2*2L+2W/2-80
4W+20+2W=4(2W+10)+W-80
6W+20=8W+40+W-80
6W-9W=-40-20
-3W=-60
W=-60/-3
W=20 FOR THE ORIGINAL WIDTH
L=2*20+10
L=40+10
L=50 FOR THE ORIGINAL LENGTH.
PROOF:
2(2*20+10)+2*20=4(2*20+10)+2*20/2-80
2(40+10)+40=4(40+10)+40/2-80
2*50+40=4*50+20-80
100+40=200+20-80
140=220-80
140=140