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x in (-oo:+oo)
2*x-(14/4) = -4 // + 4
2*x-(14/4)+4 = 0
2*x-7/2+4 = 0
2*x+1/2 = 0 // - 1/2
2*x = -1/2 // : 2
x = -1/2/2
x = -1/4
x = -1/4
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