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i in (-oo:+oo)
(1/2)*(16-i) = (11/2)*i // - (11/2)*i
(1/2)*(16-i)-((11/2)*i) = 0
(1/2)*(16-i)+(-11/2)*i = 0
1/2*(16-i)+(-11*i)/2 = 0
(1/2*2*(16-i))/2+(-11*i)/2 = 0
1/2*2*(16-i)-11*i = 0
16-12*i = 0
(16-12*i)/2 = 0
(16-12*i)/2 = 0 // * 2
16-12*i = 0
16-12*i = 0 // - 16
-12*i = -16 // : -12
i = -16/(-12)
i = 4/3
i = 4/3
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