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6/8=3/4
*- oznacza do kwadratu
6*+8*=100
x,y-liczby dodatnie
x/y=3/4 →4x=3y→x=3/4 y
x²+y²=100
(3/4y)²+y²=100
9/16y²+y²=100
25/16y²=100
y²=100*16/25
y²=64
y=8
x=6