解方程

χ－12%χ＝2.816      X+X=    χ－28%χ＝21.6   χ－χ＝3

X－X=       χ＋χ＝        χ－χ＝      χ＋χ＝15

χ＋χ＝26     χ－χ＝12        χ＋1χ＝      χ－χ＝1

X－X=     χ－χ＝0.54÷5     x－x=   χ－40%χ＝

x+x=                ×－χ＝

17－120%χ＝5    －χ＝ （1＋30%）χ＝45.5     7－2χ＝3

χ×（＋）＝      ＋2X=    χ－1＝0.9×    －χ＝

χ－÷＝    ＋2x=      ＋3χ＝      X=3  

χ÷＝÷     χ÷＝           χ÷0.4＝0.625                   

χ÷＝         χ÷＝    χ÷＝36       10×χ＝                 

 x ＝ 15      x÷ ＝      x÷＝18       4÷χ＝1×  

∶＝8∶χ       =            0.6x＋3×2.5 = 67.5        X-18%＝65.6     

X－30％X＝280            1－X＝         120%x＋x =44

 =                  0.6x＋3×2.5 = 67.5      4（x＋0.2）= 1.2         

x×（＋）= 67.5      4（x＋0.2）= 1.2         x×（＋）= 67.5     

2x+3×0.9=24.9　　       　7.5:x＝24:12              3x－6 ＝8.25 

①12 －4x＝2             ②38:x＝4.75:1         ③1/3 x＋5/6 x＝1.4 

 0.4 X－0.4×10.8 =20           X＋X =              : X = : 

0.4×（x＋3.5）＝13.2                    :＝x: 

X一20％X=60                 ：χ=：                   χ=

                              9.57－(2.57＋3.38)―2.62

 5.4+2X = 8.6              2.5:5 = x:8                  0.2 = 1- 

: ＝6 :χ        χ＋χ＝25         （18＋χ）×7＝560    

:=:x　　　　　              －4.5＋5.5＝10  

 x÷=12                   X－X=                   X∶=2∶

3.5ⅹ—2.7ⅹ=39.6           = 

 X÷=             X-0.36 X=16          （X-3）÷2=7.5

1＋25%x=3.75             :x=:4                    =15% 

4×（X-3.1）=9.2     8X+1.5×3=16.5     6 X+4 X=1.8×4    X - X＝42

 X÷0.75=    ＝       X∶5.6＝5∶3.5    35×（1－）÷

 ÷＝X：                    X÷（1――25%）＝

1－=                 4－7×1.3=9.9               ：28%=：0.7

＝：　　             　4×（x－0.8）=8　　　   　 X+X=45

 χ＋χ－6＝                 ＝30%               ：χ＝：2

1.25：1.2=：x                X:(2+5)=10.5:4                 (＋7):6=7:2.1

χ－0.8χ－6＝16            6(－3.5)=17.8＋2         0.6×（x－60%）=

（4.5－X）×0.375=0.75                1.25 ：0.25  = 

7x－3.5=10.5                        (2) x：=：下载本文