1 Answer

Stiffo · Answer 1 · 2017-03-01T18:58:56+0000

9x-71>3(3x-7u)
⇒ 9x -71 > 3*3x -3*7u (distributive property)
⇒ 9x -71 > 9x -21u
⇒ (9x -9x) -71 > (9x -9x) -21u
⇒ -71 > -21u
⇒ -21u < -71
⇒ u > -71/(-21)
⇒ u > 3 8/21

Final answer: u > 3 8/21~

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