Question

解方程（1）7.5x-x=7-0.11 &nbs...

解方程（1）7.5x-x=7-0.11 （2）18×0.6-10x=4.26（3）65.9-7.9-4x=24.76 （4）3.6x+2×1.4=8.2．

Answer 1

（1）7.5x-x=7-0.11                 
          6.5x=6.89
     6.5x÷6.5=6.89÷6.5
             x=1.06；

（2）18×0.6-10x=4.26
        10.8-10x=4.26
    10.8-10x+10x=4.26+10x
        4.26+10x=10.8
   4.26+10x-4.26=10.8-4.26
             10x=6.54
         10x÷10=6.54÷10
               x=0.654；

（3）65.9-7.9-4x=24.76   
           58-4x=24.76
        58-4x+4x=24.76+4x 
        24.76+4x=58
  24.76+4x-24.76=58-24.76
              4x=33.24 
           4x÷4=33.24÷4
               x=8.31；

（4）3.6x+2×1.4=8.2
        3.6x+2.8=8.2
    3.6x+2.8-2.8=8.2-2.8
            3.6x=5.4
       3.6x÷3.6=5.4÷3.6
               x=1.5．