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x in (-oo:+oo)
(2*x+3)/5 = -1/2 // + -1/2
(2*x+3)/5-(-1/2) = 0
(2*x+3)/5+1/2 = 0
(2*(2*x+3))/(2*5)+(1*5)/(2*5) = 0
2*(2*x+3)+1*5 = 0
4*x+11 = 0
(4*x+11)/(2*5) = 0
(4*x+11)/(2*5) = 0 // * 2*5
4*x+11 = 0
4*x+11 = 0 // - 11
4*x = -11 // : 4
x = -11/4
x = -11/4
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