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k in (-oo:+oo)
4*(6*k+7) = 220 // - 220
4*(6*k+7)-220 = 0
4*(6*k+7)-220 = 0
24*k-192 = 0
24*k-192 = 0
24*k-192 = 0 // + 192
24*k = 192 // : 24
k = 192/24
k = 8
k = 8
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