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x in (-oo:+oo)
786 = (6/5)*x // - (6/5)*x
786-((6/5)*x) = 0
(-6/5)*x+786 = 0
786-6/5*x = 0 // - 786
-6/5*x = -786 // : -6/5
x = -786/(-6/5)
x = 655
x = 655
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