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Siliconwafer · Answer 1 · 2018-02-25T22:47:10+0000

12 - 5x - 4kx = y.....subtract 12 from each side
-5x - 4kx = y - 12....factor out x on the left
x(-5 - 4k) = y - 12 ...divide both sides by -5 - 4k
x = (y - 12) / (-5 - 4k) or x = (-y + 12) / (4k + 5) <==

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