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n in (-oo:+oo)
10/7 = n/4 // - n/4
10/7-(n/4) = 0
10/7-1/4*n = 0 // - 10/7
-1/4*n = -10/7 // : -1/4
n = -10/7/(-1/4)
n = 40/7
n = 40/7
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