-100098|100
100. | 1000,98
-0
0
-9
0
-98
0
98
3/7х=9
х=9:3/7
х=27
Надеюсь помогла
1.7/10+1/7=7/10*7+1/7*10=49/70+10/70=59/70
2.7/16-12/100=7/16*25-6/25*16=175/300-96/300=79/300
3.4 85/100-2 13/14=4 17/20-2 13/14=4 238/280-2 260/280=3 518/280-2 260/280=1 258/280=1 129/140
128p-28p-72p=28p
28*11=308