magicmasha 1)= (27(11+35))/(46(19+35))= 27*46/46*54=27/27*2=1/2= 0,5;2) -2/3*(х)=6/7; *21;-2*7х=6*3, -14х=18, х=-18/14х=-9/7= -1 цел 2/7.