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b in (-oo:+oo)
(1/3)*(b+6) = (1/4)*b+8 // - (1/4)*b+8
(1/3)*(b+6)-((1/4)*b)-8 = 0
(1/3)*(b+6)+(-1/4)*b-8 = 0
1/3*(b+6)-b/4-8 = 0
(1/3*4*(b+6))/4-b/4+(-8*4)/4 = 0
1/3*4*(b+6)-b-8*4 = 0
1/3*b-32+8 = 0
1/3*b-24 = 0
(1/3*b-24)/4 = 0
(1/3*b-24)/4 = 0 // * 4
1/3*b-24 = 0
1/3*b-24 = 0 // + 24
1/3*b = 24 // : 1/3
b = 24/1/3
b = 72
b = 72
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