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k in (-oo:+oo)
4*(5*k+8) = 132 // - 132
4*(5*k+8)-132 = 0
4*(5*k+8)-132 = 0
20*k-100 = 0
20*k-100 = 0
20*k-100 = 0 // + 100
20*k = 100 // : 20
k = 100/20
k = 5
k = 5
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