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n in (-oo:+oo)
4*(-(6*n)-7) = -268 // + 268
4*(-(6*n)-7)+268 = 0
4*(-6*n-7)+268 = 0
4*(-6*n-7)+268 = 0
240-24*n = 0
240-24*n = 0
240-24*n = 0 // - 240
-24*n = -240 // : -24
n = -240/(-24)
n = 10
n = 10
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