Если c-a>8 и a-b>-7, то a) c>b; б) c>a; и) c

[latex] left { {{c-a extgreater 8} atop {a-b extgreater -7}} ight. extless = extgreater left { {{c extgreater 8+a} atop {a extgreater -7+b}} ight. = extgreater c extgreater 8-7+b=1+b extgreater b[/latex]