题目内容

解方程.
(1)
5
6
-x=
1
2
(2)x+0.75-
3
5
=0.15(3)2x+
5
8
=4.625.
(1)
5
6
-x=
1
2

5
6
-x+x=
1
2
+x,
1
2
+x=
5
6

1
2
+x-
1
2
=
5
6
-
1
2

x=
1
3

(2)x+0.75-
3
5
=0.15,
x+0.75-
3
5
+
3
5
=0.15+
3
5

x+0.75=0.75,
x+0.75-0.75=0.75-0.75,
x=0;
(3)2x+
5
8
=4.625,
2x+
5
8
-
5
8
=4.625-
5
8

2x=4,
2x÷2=4÷2,
x=2.
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