Odpowiedzi

2010-03-23T16:28:16+01:00
1/5(y-3)-2/3(y-3/5)+1/3=2/5-1/3(2y-3)
1/5y-3/5-2/3y+6/15+1/3=2/5-2/3y-1 / X 15
1/5y X 15-3/5 X 15-2/3y X 15 +6/15 X 15+1/3 X 15=2/5 X 15-2/3y X 15-1 X 15
3y-9-10y+6+5=6-10y-15
3y-10y+10y=6-15+9-6-5
3y=-11//:3
y=-3,6



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