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Mathematics 18 Online
OpenStudy (anonymous):

If 9x-8y=4 and 2x-3y=-4, then what is the value of x?

OpenStudy (tkhunny):

Multiply the first equation by 3. Multiply the second equation by -8 Add the two new equations. What happens?

OpenStudy (anonymous):

wait a min,why did you multiply it by 3 and the second one by -8?

OpenStudy (anonymous):

@tkhunny ^

OpenStudy (anonymous):

@tkhunny why did you multiply it by 3 and then by -8?

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