解方程(或解比例).(1)3x+x-6=26(2)35:x=79:712(3)1.3x+4.7x+x=60.2.

2025-06-21 14:19:55
推荐回答(1个)
回答1:

(1)3x+x-6=26
          4x-6=26
        4x-6+6=26+6
         4x÷4=32÷4
             x=8;
    
(2)

3
5
:x=
7
9
7
12

      
7
9
x=
3
5
×
7
12

   
7
9
7
9
=
7
20
÷
7
9

        x=
9
20
;    

(3)1.3x+4.7x+x=60.2
              7x=60.2
           7x÷7=60.2÷7
               x=8.6.