题目内容
解方程:
x-
=
x÷
=25 x-
x=
.
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| 9 |
考点:方程的解和解方程
专题:简易方程
分析:(1)根据等式的性质,在方程两边同时加
,再同时除以
求解;
(2)根据等式的性质,在方程两边同时乘以
求解;
(3)先化简方程,再根据等式的性质,在方程两边同时除以
求解.
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(2)根据等式的性质,在方程两边同时乘以
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| 5 |
(3)先化简方程,再根据等式的性质,在方程两边同时除以
| 1 |
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解答:
解:(1)
x-
=
x-
+
=
+
x=
x÷
=
÷
x=
;
(2)x÷
=25
x÷
×
=25×
x=5;
(3)x-
x=
x=
x÷
=
÷
x=
.
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| 13 |
| 20 |
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| 13 |
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x=
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(2)x÷
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| 5 |
x÷
| 1 |
| 5 |
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| 5 |
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x=5;
(3)x-
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| 9 |
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| 9 |
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| 9 |
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x=
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点评:本题主要考查了学生根据等式的性质解方程的能力,注意等号对齐.
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