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3/14 = (-11/21)*x // - (-11/21)*x
3/14-((-11/21)*x) = 0
(11/21)*x+3/14 = 0
11/21*x+3/14 = 0 // - 3/14
11/21*x = -3/14 // : 11/21
x = -3/14/11/21
x = -9/22
x = -9/22
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