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(1/3)*(12*f-3) = (2/3)*m+10 // - (2/3)*m+10
(1/3)*(12*f-3)-((2/3)*m)-10 = 0
(1/3)*(12*f-3)+(-2/3)*m-10 = 0
1/3*(12*f-3)+(-2*m)/3-10 = 0
(1/3*3*(12*f-3))/3+(-2*m)/3+(-10*3)/3 = 0
1/3*3*(12*f-3)-2*m-10*3 = 0
12*f-2*m-30-3 = 0
12*f-2*m-33 = 0
(12*f-2*m-33)/3 = 0
(12*f-2*m-33)/3 = 0 // * 3
12*f-2*m-33 = 0
x belongs to the empty set
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