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X-((7/16)*x)-3 = 0
X+(-7/16)*x-3 = 0
X-7/16*x-3 = 0 // - X-3
-7/16*x = -(X-3) // : -7/16
x = (-(X-3))/(-7/16)
x = -16/7*(3-X)
x = -16/7*(3-X)
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