Ответы и объяснения

2013-04-19T12:54:13+00:00

1//21y-1//3у-1//14у=5//14у
-(2//7)y-(1//14)y-(5//14)y=0
-(5//14)y-(5//14)y=0
-(5//7)y=0
y=0/(5//7)

y=0

2013-04-19T13:01:42+00:00