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((2/3)*x-(12/11))*((7/4)*x-(1/12)) = 0
((2/3)*x-12/11)*((7/4)*x-1/12) = 0
(2/3*x-12/11)*(7/4*x-1/12) = 0
( 2/3*x-12/11 )
2/3*x-12/11 = 0 // + 12/11
2/3*x = 12/11 // : 2/3
x = 12/11/2/3
x = 18/11
( 7/4*x-1/12 )
7/4*x-1/12 = 0 // + 1/12
7/4*x = 1/12 // : 7/4
x = 1/12/7/4
x = 1/21
x in { 18/11, 1/21 }
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