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9u - -7 = 61

 Oct 5, 2017
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9u - -7 = 61

 

9u - (-7) =61

9u + 7    =61    subtract 7 from sides

9u =61 - 7

9u =54             divide both sides by 9

u = 54 / 9

u = 6

 Oct 5, 2017
edited by Guest  Oct 5, 2017

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