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b in (-oo:+oo)
8-((1/4)*b) = 29/4 // - 29/4
8-((1/4)*b)-(29/4) = 0
(-1/4)*b-29/4+8 = 0
3/4-1/4*b = 0 // - 3/4
-1/4*b = -3/4 // : -1/4
b = -3/4/(-1/4)
b = 3
b = 3
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