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x in (-oo:+oo)
(1/4)*x-(2/5) = 9/5 // - 9/5
(1/4)*x-(2/5)-(9/5) = 0
(1/4)*x-2/5-9/5 = 0
1/4*x-11/5 = 0 // + 11/5
1/4*x = 11/5 // : 1/4
x = 11/5/1/4
x = 44/5
x = 44/5
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