X-(7 5/9-5 1/6)=-3,5 ,6+3 4/7)= -8 1/4

(1) х-(7 5/9-5 1/6)=-3,5
1) 7 5/9-5 1/6= 68/9-31/6=136/18-93/18=43/18
2) х-43/18=-35/10
х=-35/10+43/18=-315/90+215/90=-100/90=-1 10/90=-1 1/9
х=-1 1/9
(2) х-(-4,6+3 4/7)=-8 1/4
1) -4,6+3 4/7=-46/10+25/7=-322/70+250/70=-72/70
2) х+72/70=-33/4
х=-33/4-72/70=-1155/140-144/70=-1299/70=-18 39/70
х=-18 39/70