1) -4х=28; х=28/-4=-7;
2) 0,7х=-4,2; х=-4,2/0,7=-6;
3) -1,4х=-5,6; х=-5,6/-1,4= 4;
4) 1/3х=-2/9; х=-2/9:1/3=-2/9*3/1=-2/3;
5) 4/7х=1; х=1:4/7=1*7/4=7/4=1цел. 3/4;
6) 3х=7; х=7/3=2цел. 1/3;
7) 3/4х=12; х=12:3/4=12*4/3=4*4=16;
8)-2 1/3х=9; -7/3х=9; х=9:(-7/3)=9*(-3/7)= -27/7= -3 цел.6/7;
9) 18х=9; х=9/18=1/2.