题目内容
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分析:(1)先化简方程,再依据等式的性质,方程两边同时除以
求解,
(2)先化简方程,再依据等式的性质,方程两边同时减
,再同时除以
求解.
| 8 |
| 15 |
(2)先化简方程,再依据等式的性质,方程两边同时减
| 20 |
| 3 |
| 4 |
| 3 |
解答:解:(1)
x+
x=
,
x=
,
x÷
=
÷
,
x=2
;
(2)
×5+
x=12,
+
x-
=12-
,
x=
,
x÷
=
÷
,
x=4.
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x=2
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(2)
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| 20 |
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| 16 |
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x=4.
点评:本题主要考查学生依据等式的性质解方程的能力.
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