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w in (-oo:+oo)
(1/4)*(8*w+4)+(2/3)*w+2 = 0
1/4*(8*w+4)+(2*w)/3+2 = 0
(1/4*3*(8*w+4))/3+(2*w)/3+(2*3)/3 = 0
1/4*3*(8*w+4)+2*w+2*3 = 0
8*w+3+6 = 0
8*w+9 = 0
(8*w+9)/3 = 0
(8*w+9)/3 = 0 // * 3
8*w+9 = 0
8*w+9 = 0 // - 9
8*w = -9 // : 8
w = -9/8
w = -9/8
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