题目内容
解方程．
x-
=
x+
x=
x÷
=12．
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x+
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①
x-
=
x+
-
=
+
x=0.65
x×2=0.65×2
x=1.3
②x+
x=
x=
×
x=
×
x=
③
x÷
=12
x×4=12
x=12
x×
=12×
x=4.5
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x=1.3
②x+
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| 8 |
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x=
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③
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| 8 |
x=4.5
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