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(2/3)*x-((5/9)*x) = 5 // - 5
(2/3)*x-((5/9)*x)-5 = 0
(2/3)*x+(-5/9)*x-5 = 0
1/9*x-5 = 0 // + 5
1/9*x = 5 // : 1/9
x = 5/1/9
x = 45
x = 45
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