/ - kreska ułamkowa
1. x/x+1 = x+2/x+2
2. 4/x-1=5/2x-2
1. x/x+1=x+2/x+2 /*x
x+x=x^2+2+2x
2x-x^2-2x=2
x^2=2 /pierwiastkujemy obustronnie
x= pierwiastek z 2
2. 4/x-1=5/2x-2 /*2x
8-2x=5-4x
2x=-3 /:2
x= -1 1/2
^ to potega * to razy
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1. x/x+1=x+2/x+2 /*x
x+x=x^2+2+2x
2x-x^2-2x=2
x^2=2 /pierwiastkujemy obustronnie
x= pierwiastek z 2
2. 4/x-1=5/2x-2 /*2x
8-2x=5-4x
2x=-3 /:2
x= -1 1/2
^ to potega * to razy