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2*(x-5)=x+5
2x-10=x+5
2x-x=5+10
x=15
spr.
2x-10=x+5
2*15-10=15+5
30-10=20
20=20
L=P
odp.obecnie Ania ma 15 lat
x - 5 = (x+5)/2
x - 5 = 0,5x + 2,5
x - 0,5x = 2,5 + 5
0,5x = 7,5
x = 15
Ania ma 15 lat