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k in (-oo:+oo)
2*(3*k-7) = -62 // + 62
2*(3*k-7)+62 = 0
2*(3*k-7)+62 = 0
6*k+48 = 0
6*k+48 = 0
6*k+48 = 0 // - 48
6*k = -48 // : 6
k = -48/6
k = -8
k = -8
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