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x in (-oo:+oo)
(2/3)*(m-30) = (1/4)*b+8 // - (1/4)*b+8
(2/3)*(m-30)-((1/4)*b)-8 = 0
(2/3)*(m-30)+(-1/4)*b-8 = 0
2/3*(m-30)-b/4-8 = 0
(2/3*4*(m-30))/4-b/4+(-8*4)/4 = 0
2/3*4*(m-30)-b-8*4 = 0
8/3*m-b-80-32 = 0
8/3*m-b-112 = 0
(8/3*m-b-112)/4 = 0
(8/3*m-b-112)/4 = 0 // * 4
8/3*m-b-112 = 0
x belongs to the empty set
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