题目内容

解方程.
2x+8=11.26
x-1.2=9.3
5x+8=22
1.2x+0.56=2
6x-2x=18
1.5x+1.7x=6.4.

(1)2x+8=11.26,
   2x+8-8=11.26-8,
       2x=3.26,
    2x÷2=3.26÷2,
        x=1.63;

(2)x-1.2=9.3,
 x-1.2+1.2=9.3+1.2,
         x=10.5;

(3)5x+8=22,
   5x+8-8=22-8,
       5x=14,
    5x÷5=14÷5,
        x=2.8;

(4)1.2x+0.56=2,
1.2x+0.56-0.56=2-0.56,
          1.2x=1.44,
     1.2x÷1.2=1.44÷1.2,
             x=1.2;

(5)6x-2x=18,
        4x=18,
     4x÷4=18÷4,
         x=4.5;

(6)1.5x+1.7x=6.4,
          3.2x=6.4,
     3.2x÷3.2=6.4÷3.2,
             x=2.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网