38-(-16)=38+16=54;
14-38=-(38-14)=-24;
-1,7-(-8)=8-1,7=6,3;
-18,9-36,4=-(18,9+36,4)=-55,3;
-5/8-(-7/12)=-15/24+14/24=-1/24;
5/9-2=-(1 9/9-5/9)=-1 4/9;
-7 7/24-4 13/16=-(7 14/48+4 39/48)=-11 53/48=
=-12 5/48;
-3 3/14-( -2 5/6)=-3 9/42+2 35/42=
=-(2 51/42-2 35/42)=-16/42=-8/21.
-3,2+х=5,2;
х=5,2+3,2;
х=8,4;
6,7+у==-4,3;
у=-4,3-6,7;
х=-11;
5,7-х=8,9;
х=5,7-8,9;
х=-3,2;
х-4,3=-2,1;
х=-2,1+4,3;
х=2,2.