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18-(2*(1/122)*x) = 9-((1/122)*x) // - 9-((1/122)*x)
(1/122)*x-(2*(1/122)*x)-9+18 = 0
(-1/61)*x+(1/122)*x-9+18 = 0
9-1/122*x = 0 // - 9
-1/122*x = -9 // : -1/122
x = -9/(-1/122)
x = 1098
x = 1098
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