精选问答
解方程150%×6+5x=1223x-20%x=110-2x=2.4.

2019-05-28

解方程
150%×6+5x=12
2
3
x-20%x=1
10-2x=2.4.
优质解答
①150%×6+5x=12
                     9+5x=12
                   9+5x-9=12-9
                          5x=3
                      5x÷5=3÷5
                             x=0.6

2
3
x-20%x=1
          
7
15
x=1
    
7
15
15
7
=1×
15
7

                 x=2
1
7


  ③10-2x=2.4
 10-2x+2x=2.4+2x
     2.4+2x=10
2.4+2x-2.4=10-2.4
             2x=7.6
          2x÷2=7.6÷2
                 x=3.8
①150%×6+5x=12
                     9+5x=12
                   9+5x-9=12-9
                          5x=3
                      5x÷5=3÷5
                             x=0.6

2
3
x-20%x=1
          
7
15
x=1
    
7
15
15
7
=1×
15
7

                 x=2
1
7


  ③10-2x=2.4
 10-2x+2x=2.4+2x
     2.4+2x=10
2.4+2x-2.4=10-2.4
             2x=7.6
          2x÷2=7.6÷2
                 x=3.8
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