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1280*x = y/0.8 // - y/0.8
1280*x-(y/0.8) = 0
1280*x-1.25*y = 0
1280*x-1.25*y = 0 // + -1.25*y
1280*x = -(-1.25*y) // : 1280
x = (-(-1.25*y))/1280
x = 0.00097656*y
x = 0.00097656*y
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