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