题目内容
5
-2x=5-1
-2
.
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| 5 |
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| 10 |
5
-2x=5-1
-2
,
5
-2x=1
,
5
-2x+2x=1
+2x,
5
-1
=1
+2x-1
,
4÷2=2x÷2,
x=2.
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5
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5
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5
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4÷2=2x÷2,
x=2.
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