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x加三分之八百等于x分之五百?
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x加三分之八百等于x分之五百
800/(x+3) = 500/x
800x = 500(x+3)
800x = 500x+1500
300x = 1500
x = 5
800/(x+3) = 500/x
800x = 500(x+3)
800x = 500x+1500
300x = 1500
x = 5
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