Step-by-step explanation:
84 = 2(l+b)
L+b = 84 / 2
L+b = 42
There fore..
Length is 42 and breadth is 42 - 8
Answer:
= 7-w
( )^2 = (7-w)^2
g = (7-w)^2
k=8
2k-12+3k=3k+4
5k-12=3k+4
2x-12=4
2k=16