题目内容

x-(
1
3
+
2
3
)=
7
12
2x+
7
9
=
7
9
15x-4.5×2=517x+3x+26=74
5.6x-x=41 6.3×0.7+4x=6.5.
(1)x-(
1
3
+
2
3
)=
7
12

x-1=
7
12

x-1+1=
7
12
+1
x=1
7
12


(2)2x+
7
9
=
7
9

2x+
7
9
-
7
9
=
7
9
-
7
9

2x÷2=0÷2
x=0;

(3)15x-4.5×2=51
15x-9+9=51+9
15x÷15=60÷15
x=4;

(4)7x+3x+26=74
10x+26-26=74-26
10x÷10=48÷10
x=4.8;

(5)5.6x-x=41
4.6x=41
4.6x÷4.6=41÷4.6
x=8
21
23


(6)6.3×0.7+4x=6.5
4.41+4x-4.41=6.5-4.41
4x÷4=2.09÷4
x=0.5225.
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