Раскройте скобки и выражения: а) 7/8*(4-/4+x) б) -(3/19-y)-1/2(y+2/19) в) -7/13*(26/27+/9-x) г) -(1/16-y)+3/4(1/8+y)

А) 7/2-7/8х-3/4-х=(7/2-3/4)-(7/8х+х)=11/4-1 7/8х=2 3/4-1 7/8х
б)-3/19+у-1/2у-1/19=(у-1/2у)-(3/19+1/19)=1/2у-4/19
в)-14/27-7/13х-4/9+х=(х-7/13х)-(14/27+4/9)=(13/13х-7/13х)-(14/27+12/27)=6/13х-26/27
г)-1/16+у+3/32+3/4у=(у+3/4у)-(1/16-3/32)=1 3/4у-(2/32-3/32)=1 3/4у-(-1/32)=1 3/4у+1/32

А)=7/2-7/8х-3/4-х=14/4-3/4-1 7/8х=11/4-1 7/8х=
=2 3/4-1 7/8х
б)=-3/19+у-1/2у-1/19=-4/19+1/2у
в)=-14/27-7/13х-4/9+х=-14/27-12/27+6/13х=
=-26/27+6/13х
г)=-1/16+у+3/32+3/4у=-2/32+3/32+1 3/4у= =1/32+1 3/4у