当x= 时,代数式3x-1与2x+6的值互为相反数

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当x=时,代数式3x-1与2x+6的值互为相反数当x=时,代数式3x-1与2x+6的值互为相反数当x=时,代数式3x-1与2x+6的值互为相反数3x-1+2x+6=05x=-5x=-13x-1+2x+

当x= 时,代数式3x-1与2x+6的值互为相反数
当x= 时,代数式3x-1与2x+6的值互为相反数

当x= 时,代数式3x-1与2x+6的值互为相反数
3x-1+2x+6=0
5x=-5
x=-1

3x-1+2x+6=0
5x=-5
x=-1

-1的时候
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收起

值互为相反数也就说两个数相加等于0
3X-1+2X+6=0
X=-1

果断填-1进去