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14×5-3x=25 5x-0.5×8=0 (8-1.2)x=6.8 (1-37.5%)x=62.5 9x-16

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14×5-3x=25 5x-0.5×8=0 (8-1.2)x=6.8
(1-37.5%)x=62.5 9x-
1
6
(1)14×5-3x=25,70-3x=25,
         70-3x+3x=25+3x,
            3x+25=70,
         3x+25-25=70-25,
               3x=45,
            3x÷3=45÷3,
                x=15;
(2)5x-0.5×8=0,
          5x-4=0,
        5x-4+4=0+4,
             5x=4,
          5x÷5=4÷5,
              x=0.8,
(3)(8-1.2)x=6.8,
           6.8x=6.8,
      6.8x÷6.8=6.8÷6.8,
              x=1;
(4)(1-37.5%)x=62.5,
          0.625x=62.5,
   0.625x÷0.625=62.5÷0.625,
               x=100;
(5)9x-
1
6=
5
6,
  9x-
1
6+
1
6=
5
6+
1
6,
        9x=1,
     9x÷9=1÷9,
         x=
1
9;
(6)
3
4x-5%=17.5,
 
3
4x-5%+5%=17.5-5%,
      
3
4x=17.45;
  
3
4x÷
3
4=17.45÷
3
4,
         x=
349
15.