Answer:
L=7cm
W= 26cm
Explanation:
Step one
Given data
let the lenght be x
L= x
W= 3x+5
P= 66
Step two:
P=2L+2W
substitute
66= 2x+2(3x+5)
66= 2x+6x+10
66= 8x+10
collect like terms
66-10= 8x
56= 8x
x= 7cm
L= 7cm
W= 3(7)+5
W= 21+5
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