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x in (-oo:+oo)
(-1/2)*x+1 = 57/32 // - 57/32
(-1/2)*x-(57/32)+1 = 0
(-1/2)*x-57/32+1 = 0
-1/2*x-25/32 = 0 // + 25/32
-1/2*x = 25/32 // : -1/2
x = 25/32/(-1/2)
x = -25/16
x = -25/16
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