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x in (-oo:+oo)
x = (89*y)/79.5 // - (89*y)/79.5
x-((89*y)/79.5) = 0
x-1.11949686*y = 0
x-1.11949686*y = 0 // + -1.11949686*y
x = -(-1.11949686*y)
x = 1.11949686*y
x = 1.11949686*y
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