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24-08-2016
Mathematics

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-7 - 7 ( 8x - 7 ) = - 19 + 5x

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hai0612 hai0612

24-08-2016

-7 - 7( 8x - 7 ) = -19 + 5x
⇔ -56x + 49 = -12 + 5x
⇔ -61x = -61
⇔ x = 1

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