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x in (-oo:+oo)
(4/9)*x-1 = 1/2 // - 1/2
(4/9)*x-(1/2)-1 = 0
(4/9)*x-1/2-1 = 0
4/9*x-3/2 = 0 // + 3/2
4/9*x = 3/2 // : 4/9
x = 3/2/4/9
x = 27/8
x = 27/8
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