题目内容
解方程.
÷x=0.8
x+5×4=95x-
x-4=18.
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(1)
÷x=0.8,
÷x×x=
×x,
x=
,
x=
,
x÷
=
÷
,
x=
×
,
x=
;
(2)
x+5×4=95,
x+20=95,
x+20-20=95-20,
x=75,
x÷
=75÷
,
x=75×
,
x=125;
(3)x-
x-4=18,
(1-
)x-4+4=18-4,
x=14,
x×4=14×4,
x=56.
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x=
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x=
| 1 |
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(2)
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x=75×
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x=125;
(3)x-
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(1-
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| 1 |
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x=56.
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