Odpowiedzi

2010-03-22T07:52:25+01:00
5(x-y)=x+y
x=y+125

5(y+125_y)=y+125+y
x=y+125

5*125=2y+125
x=y+125

625=2y+125
x=y+125

2y=500
x=y+125

y=250
x=375