1) х/7+7/7= 2)а+5в/15+2а+4в/15= 3)х/3+х-2/5= 4)а/6+в/6= 5)х+4у/12+2х+5у/12=
1) = х+7 7 2)= а+5в+2а+4в =3а+9в = 3(а+3в) = а+3в 15 15 15 5 3) х + х-2 =5х+3(х-2) =5х+3х-6 =8х-6 3 5 3*5 15 15 4) =а+в 6 5) =х+4у+2х+5у =3х+9у =3(х+3у)=х+3у 12 12 12 4