试题与答案

解方程.χ+37=34χ-23=12+148χ-9.1=22.9.

题型:解答题

题目:

解方程.
χ+
3
7
=
3
4
χ-
2
3
=
1
2
+
1
4
8χ-9.1=22.9.

答案:

(1)x+

3
7
=
3
4

x+

3
7
-
3
7
=
3
4
-
3
7

x=

9
28

(2)x-

2
3
=
1
2
+
1
4

x-

2
3
=
3
4

x-

2
3
+
2
3
=
3
4
+
2
3

x=

17
12

(3)8x-9.1=22.9,

8x-9.1+9.1=22.9+9.1,

8x÷8=32÷8,

x=4.

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