问题 解答题
解方程.
3x-
3
4
=
1
4
x-(
1
4
+
3
8
)=
1
2
2(x-7)=8.96.
答案

(1)3x-

3
4
=
1
4

3x-

3
4
+
3
4
=
1
4
+
3
4

3x÷3=1÷3,

x=

1
3

(2)x-(

1
4
+
3
8
)=
1
2

x-

5
8
=
1
2

x-

5
8
+
5
8
=
1
2
+
5
8

x=1

1
8

(3)2(x-7)=8.96,

2(x-7)÷2=8.96÷2,

x-7+7=4.48+7,

x=11.48.

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