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(5/18)*x+(2/9)*x = 2/9 // - 2/9
(5/18)*x+(2/9)*x-(2/9) = 0
(5/18)*x+(2/9)*x-2/9 = 0
1/2*x-2/9 = 0 // + 2/9
1/2*x = 2/9 // : 1/2
x = 2/9/1/2
x = 4/9
x = 4/9
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