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b in (-oo:+oo)
((3*3)/4)*b+5 = 128 // - 128
((3*3)/4)*b-128+5 = 0
9/4*b-123 = 0 // + 123
9/4*b = 123 // : 9/4
b = 123/9/4
b = 164/3
b = 164/3
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