oblicz obwody z każdej z figur
a) ob = 2(x-1)+2x = 2x-2+2x = 4x-2
b) ob = x+x+2+x+3 = 3x+5
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a) ob = 2(x-1)+2x = 2x-2+2x = 4x-2
b) ob = x+x+2+x+3 = 3x+5