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bok krotszy --> y
uklad rownan
x = 3y - 3
2x + 2y = 66
x = 33 - y
33 - y = 3y - 3
36 = 4y
y = 9
x = 33 - 9
x = 24
Odp. Wymiary prostokąta 9 m x 24 m
66m =(3x-3m)*2+1x*2
66m=6x-6m+2x
66m=8x-6m/+6m
72m=8x/:8
x=9m
szer=9m
dł=3*9m-3m=24m
24m na 9m