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x in (-oo:+oo)
(3/5)*x = (2/3)*x+1 // - (2/3)*x+1
(3/5)*x-((2/3)*x)-1 = 0
(3/5)*x+(-2/3)*x-1 = 0
-1/15*x-1 = 0 // + 1
-1/15*x = 1 // : -1/15
x = 1/(-1/15)
x = -15
x = -15
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