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(9/10)*x-((10/11)*x) = 2 // - 2
(9/10)*x-((10/11)*x)-2 = 0
(9/10)*x+(-10/11)*x-2 = 0
-1/110*x-2 = 0 // + 2
-1/110*x = 2 // : -1/110
x = 2/(-1/110)
x = -220
x = -220
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