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n in (-oo:+oo)
10-((2/3)*n) = 53 // - 53
10-((2/3)*n)-53 = 0
(-2/3)*n-53+10 = 0
-2/3*n-43 = 0 // + 43
-2/3*n = 43 // : -2/3
n = 43/(-2/3)
n = -129/2
n = -129/2
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