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2*x-((1/4)*x) = -28 // + 28
2*x-((1/4)*x)+28 = 0
2*x+(-1/4)*x+28 = 0
7/4*x+28 = 0 // - 28
7/4*x = -28 // : 7/4
x = -28/7/4
x = -16
x = -16
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