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x in (-oo:+oo)
(8*x)/15-1 = x/2 // - x/2
(8*x)/15-(x/2)-1 = 0
1/30*x-1 = 0 // + 1
1/30*x = 1 // : 1/30
x = 1/1/30
x = 30
x = 30
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