若2a与1-a互为相反数,则a等于 ___ ;x=3和x=-6中, ___ 是方程x-3(x+2)=6的解.
人气:459 ℃ 时间:2020-04-18 04:23:43
解答
根据题意得:2a+1-a=0,
解得:a=-1;
方程x-3(x+2)=6,
去括号得:x-3x-6=6,
移项合并得:-2x=12,
解得:x=-6.
故答案为:-1;-6.
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