L=64cm
a=3x
b=6x
L=3x+3x+6x+6x=6x+12x=18x
18x=64
9x=32
x=3 5/9
a=3*3 5/9=10 2/3. b=6*3 5/9=21 1/3
Odpowiedź: boki tego prostokąta wynoszą 10 2/3 i 21 1/3
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L=64cm
a=3x
b=6x
L=3x+3x+6x+6x=6x+12x=18x
18x=64
9x=32
x=3 5/9
a=3*3 5/9=10 2/3. b=6*3 5/9=21 1/3
Odpowiedź: boki tego prostokąta wynoszą 10 2/3 i 21 1/3