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b=a+4 - bok dłuższy
2a+2b=32
b=a+4
2a+2(a+4)=32
b=a+4
2a+2a+8=32
b=a+4
4a+8=32
b=a+4
4a=24
b=a+4
a=6
b=6+4
a=6
b=10
Odp. Jeden bok ma 6, a drugi 10.