方程两边是负数怎么办,如负二十分之一x等于负一 -0.05x=-1
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/30 07:06:25
方程两边是负数怎么办,如负二十分之一x等于负一 -0.05x=-1
方程两边是负数怎么办,如负二十分之一x等于负一 -0.05x=-1
方程两边是负数怎么办,如负二十分之一x等于负一 -0.05x=-1
-0.05x=-1
则x=(-1)/(-0.05)=1/0.05=20
直接变正 0.05x=1
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两边负号可以直接约去,相当于两边同乘以或者除以负一。所以两边都是正的。正确答案20
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两边负号可以直接约去,相当于两边同乘以或者除以负一。所以两边都是正的。正确答案20
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收起
两边负号都去掉 就变成 0.05x=1
-0.05X=-1,两边同时乘以或者除以-1,得:0.05x=1,再两边同时除以0.05得.x=1/0.05.分子分母同时乘以100.得,x=100/5.解得.x=20
负二十分之一x=负一
【两种办法】
(1)两边乘以-1
二十分之一x=1
(2)两边+1+二十分之一x
二十分之一x=1
然后两边乘以20
x=20