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(1/5)*x-2/9 = 4*x-(181/45) // - 4*x-(181/45)
(1/5)*x-(4*x)-2/9+181/45 = 0
(1/5)*x-4*x-2/9+181/45 = 0
19/5-19/5*x = 0 // - 19/5
-19/5*x = -19/5 // : -19/5
x = -19/5/(-19/5)
x = 1
x = 1
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