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12*x-((4*y)/16) = 0
12*x+(-1/4)*y = 0
12*x-1/4*y = 0 // + -1/4*y
12*x = -(-1/4*y) // : 12
x = (-(-1/4*y))/12
x = 1/48*y
x = 1/48*y
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