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(4/7)x -szerokość
44=2(x+4/7x)
22=11/7 x
x=14
4/7 *14=8
P=14*8=112
Pole prostokąta wynosi 112cm².
b. drugi bok= 4/7x= 8
2*4/7x+2x=44
3,1/7x=44
22/7x=44
x=14
P=a*b
P=14*8=112 cm²;)