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x in (-oo:+oo)
4^2*x = 1/2 // - 1/2
4^2*x-(1/2) = 0
4^2*x-1/2 = 0
16*x-1/2 = 0 // + 1/2
16*x = 1/2 // : 16
x = 1/2/16
x = 1/32
x = 1/32
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