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(1/4)*x = (1/3)*y // - (1/3)*y
(1/4)*x-((1/3)*y) = 0
(1/4)*x+(-1/3)*y = 0
1/4*x-1/3*y = 0 // + -1/3*y
1/4*x = -(-1/3*y) // : 1/4
x = (-(-1/3*y))/1/4
x = 4/3*y
x = 4/3*y
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