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II liczba = y
x/y = 3/8
(x+17)/( y/2) = 8/5
3y = 8x
5(x+17) = 8*y/2
y = 8x/3
5x+85 = 4y
y = 8x/3
5x+85 = 4(8x/3)
y = 8x/3
5x+85 = 32x/3 |*3
y = 8x/3
15x+255 = 32x
y = 8x/3
15x-32x = -255
y = 8x/3
-17x = -255 |:(-17)
y = 8x/3
x = 15
y = 8*15/3
x = 15
y = 40
x = 15
x = 15
y = 40
I liczba = 15
II liczba = 40 << szukane liczby