Suma licznika i mianownika ulamka wynosi 46 .Gdy od licznika odejmniemy 2 a do mianownika dodamy 15 to otrzymamy (2/10)<- ulamek
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x+y=46
(x-2)/(y+15)= 2/10
x=46-y
(x-2)/(y+15)=1/5
x=46-y
y+15=5(x-2)
x=46-y
y+15=5x-10
x=46-y
y+15=5(46-y)-10
x=46-y
y+15= 230-5y-10
x=46-y
y+5y=230-10-15
x=46-y
6y= 205
x=46-y
y= 205/6
x=46-205/6
x= 276/6-205/6
x= 71/6=
x=71/6=11 5/6
y=205/6 = 34 1/6
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