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y in (-oo:+oo)
y/8 = 12.8 // - 12.8
y/8-12.8 = 0
1/8*y-12.8 = 0 // + 12.8
1/8*y = 12.8 // : 1/8
y = 12.8/1/8
y = 102.4
y = 102.4
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