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x in (-oo:+oo)
x/3 = 5*x-590 // - 5*x-590
x/3-(5*x)+590 = 0
x/3-5*x+590 = 0
590-14/3*x = 0 // - 590
-14/3*x = -590 // : -14/3
x = -590/(-14/3)
x = 885/7
x = 885/7
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