题目内容
解方程.
(x+
)=
60%x+
=
.
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60%x+
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| 4 |
分析:(1)根据等式的性质,两边同乘3,得x+
=2,两边同减去
即可;
(2)原式变为
x+
=
,根据等式的性质,两边同减去
,再同乘
即可.
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(2)原式变为
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| 3 |
解答:解:(1)
(x+
)=
(x+
)×3=
×3
x+
=2
x+
-
=2-
x=
;
(2)60%x+
=
x+
=
x+
-
=
-
x=
x×
=
×
x=
.
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x+
| 3 |
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x+
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x=
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(2)60%x+
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| 1 |
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| 11 |
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x=
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点评:此题考查了根据等式的性质解方程,即等式两边同加上、同减去、同乘上或同除以一个不为0的数,等式仍相等.同时注意“=”上下要对齐.
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