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x-5=1/2*(x+5)
x-5=1/2x+2 i 1/2
1/2x=7 i 1/2 /*2
x=15
Odp: Ania ma 15 lat
X-5=1/2*(x+5)
x-5=½ x+2 i ½
1/2x=7 i ½ /*2
x=15
Odp: Ania teraz ma 15 lat
½