题目内容
解方程.
2×(
+x)=8
÷x+
=
×
-3x=
.
2×(
| 4 |
| 5 |
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 1 |
| 10 |
(1)2×(
+x)=8
2×(
+x)÷2=8÷2
+x=4
+x-
=4-
x=
;
(2)
÷x+
=
÷x+
-
=
-
=
×4x=
×4x
2x=3
2x÷2=3÷2
x=
;
(3)
×
-3x=
-3x=
×10-3x×10=
×10
6-30x=1
6-30x-1=1-1
5-30x=0
5-30x+30x=30x+0
30x=5
30x÷30=5÷30
x=
.
| 4 |
| 5 |
2×(
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
x=
| 16 |
| 5 |
(2)
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4x |
| 1 |
| 2 |
| 3 |
| 4x |
| 1 |
| 2 |
2x=3
2x÷2=3÷2
x=
| 3 |
| 2 |
(3)
| 4 |
| 5 |
| 3 |
| 4 |
| 1 |
| 10 |
| 3 |
| 5 |
| 1 |
| 10 |
| 3 |
| 5 |
| 1 |
| 10 |
6-30x=1
6-30x-1=1-1
5-30x=0
5-30x+30x=30x+0
30x=5
30x÷30=5÷30
x=
| 1 |
| 6 |
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