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解方程.5x-(12+14)=11245-x=151.1x+2.2=3.3-4.4x.

题目详情
解方程.
5x-(
1
2
+
1
4
)=
1
12
           
4
5
-x=
1
5

1.1x+2.2=3.3-4.4x.
▼优质解答
答案和解析
(1)5x-(
1
2
+
1
4
)=
1
12
     
              5x-
3
4
=
1
12
 
           5x-
3
4
+
3
4
=
1
12
+
3
4

                5x=
5
6

             5x÷5=
5
6
÷5
                 x=
1
6


(2)
4
5
-x=
1
5

  
4
5
-x+x=
1
5
+x
    
1
5
+x=
4
5

  
1
5
+x-
1
5
=
4
5
-
1
5

       x=
3
5


(3)1.1x+2.2=3.3-4.4x
1.1x+2.2+4.4x=3.3-4.4x+4.4x
     5.5x+2.2=3.3
 5.5x+2.2-2.2=3.3-2.2
    5.5x÷5.5=1.1÷5.5
            x=0.2.