:当X=__________时,式子x-1/2与x-2/3互为相反数

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:当X=__________时,式子x-1/2与x-2/3互为相反数
:当X=__________时,式子x-1/2与x-2/3互为相反数

:当X=__________时,式子x-1/2与x-2/3互为相反数
x-1/2=-(x-2/3)
x-1/2=-x+2/3
2X=6/7
X=3/7

当X=3/7时,式子x-1/2与x-2/3互为相反数

x-1/2=-(x-2/3)
x-1/2=-x+2/3
2X=7/6
X=7/12
当X=7/12时,式子x-1/2与x-2/3互为相反数