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x in (-oo:+oo)
350 = (5/3)*x+455 // - (5/3)*x+455
350-((5/3)*x)-455 = 0
(-5/3)*x-455+350 = 0
-5/3*x-105 = 0 // + 105
-5/3*x = 105 // : -5/3
x = 105/(-5/3)
x = -63
x = -63
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