Ответ:
1)а/4-b/2=a/4-2b/4=a-2b/4
2)3/x+c/y=3y/xy+xc/xy=3y+xc/xy
3)12-2x/x-2+10-x/2-x=12-2x/x-2-(10-x)/x-2=12-2x-10+x/x-2=2-x/x-2=-(-2+x)/x-2=-(x-2)/x-2=-1
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Ответ:
1)а/4-b/2=a/4-2b/4=a-2b/4
2)3/x+c/y=3y/xy+xc/xy=3y+xc/xy
3)12-2x/x-2+10-x/2-x=12-2x/x-2-(10-x)/x-2=12-2x-10+x/x-2=2-x/x-2=-(-2+x)/x-2=-(x-2)/x-2=-1