题目内容
解方程:
x+
x=2-
2x-50%x=1-
:0.4=
:x.
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2x-50%x=1-
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(1)
x+
x=2-
,
(
+
)x=
,
x=
,
x×
=
×
,
x=2;
(2)2x-50%x=1-
,
(2-50%)x=
,
(2-
)x=
,
x=
,
x×
=
×
,
x=
;
(3)
:0.4=
:x,
x=0.4×
,
x=
×
,
x=
,
x×3=
×3,
x=
.
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(
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x=2;
(2)2x-50%x=1-
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(2-50%)x=
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(2-
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x=
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(3)
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x=
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