3x-5+(1-2x)=0,
去括号得:3x-5+1-2x=0,
移项、合并得:x=4,
所以填4.
如果代数式3x-5与1-2x的值互为相反数,那么x=_.
如果代数式3x-5与1-2x的值互为相反数,那么x=______.
数学人气:146 ℃时间:2019-09-17 04:03:11
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