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(2/3)*x-((5/9)*x) = 2 // - 2
(2/3)*x-((5/9)*x)-2 = 0
(2/3)*x+(-5/9)*x-2 = 0
1/9*x-2 = 0 // + 2
1/9*x = 2 // : 1/9
x = 2/1/9
x = 18
x = 18
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