若ax+b=a-x (a.b是已知数,且a≠-1),则x=______.

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若ax+b=a-x (a.b是已知数,且a≠-1),则x=______.
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若ax+b=a-x (a.b是已知数,且a≠-1),则x=______.
若ax+b=a-x (a.b是已知数,且a≠-1),则x=______.

若ax+b=a-x (a.b是已知数,且a≠-1),则x=______.
(a-b)/(a+1)

X=(a-b)/(a+1)

x=(a-b)/(a+1)