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Mathematics 8 Online
OpenStudy (anonymous):

81xy/9x?

OpenStudy (anonymous):

y/9. Because 81/9= 9 and the x on the top and bottom cross out, leaving the y on the top.

OpenStudy (luigi0210):

Think of it this way: \[\frac{81}{9}* \frac{x}{x}*\frac{y}{1}\]

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