Question 168379
L=3W
3W*W=(L+4)(W+4)-176
3W^2=(3W+4)(W+4)-176
3W^2=3W^2+12W+4W+16-176
0=16W+16-176
16W=-16+176
16W=160
W=160/16
W=10 ANS. FOR THE ORIGINAL WIDTH .
L=3*10=30 ANS. FOR THE ORIGINAL LENGTH.
PROOF:
10*30=(10+4)(30+4)-176
300=14*34-176
300=476-176
300=300