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II - 2x
III - 2x+10
x+2x+2x+10 = 190
5x+10 = 190
5x = 190-10
5x = 180 |:5
x = 36
I - 36
II - 36*2 = 72
III - 72+10 = 82
2x + 10 cm częśc trzecia
2x część druga
x+ 2x + 2x +10cm = 190 / - 10
5x = 180cm /5
x= 36
36*2 = 72
72 + 10 = 82
sprawdzenie 36 + 72+ 82= 190 cm