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b in (-oo:+oo)
2*(b+4) = 22 // - 22
2*(b+4)-22 = 0
2*(b+4)-22 = 0
2*b-14 = 0
2*b-14 = 0
2*b-14 = 0 // + 14
2*b = 14 // : 2
b = 14/2
b = 7
b = 7
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