题目内容

解方程
3
4
x-1.4=3.6+
2
3
x                                
 1.2:
2
3
=
x
5
(1)
3
4
x-1.4=3.6+
2
3
x,
    
3
4
x-1.4-
2
3
x=3.6+
2
3
x-
2
3
x,
       
1
12
x-1.4=3.6,
    
1
12
x-1.4+1.4=3.6+1.4,
            
1
12
x=5,
        
1
12
x÷
1
12
=5÷
1
12

                x=60,

(2)1.2:
2
3
=
x
5

       
2
3
x=1.2×5,
       
2
3
x=6,
    
2
3
x÷
2
3
=6÷
2
3

         x=9.
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