题目内容
解方程:
x+
=
5x÷0.5=429:4=4.5:x
:x=
:
.
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(1)
x+
=
,
x+
-
=
-
,
x×
=
×
,
x=
;
(2)5x÷0.5=42,
5x÷0.5×0.5=42×0.5,
5x÷5=21÷5,
x=4.2;
(3)9:4=4.5:x
9x=4×4.5,
9x÷9=18÷9,
x=2;
(4)
:x=
:
,
x=
×
,
x×2=
×2,
x=
.
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x=
| 1 |
| 2 |
(2)5x÷0.5=42,
5x÷0.5×0.5=42×0.5,
5x÷5=21÷5,
x=4.2;
(3)9:4=4.5:x
9x=4×4.5,
9x÷9=18÷9,
x=2;
(4)
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x=
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