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8*(4*q-5)-(7*q) = (1/4)*r+6 // - (1/4)*r+6
8*(4*q-5)-(7*q)-((1/4)*r)-6 = 0
8*(4*q-5)-7*q+(-1/4)*r-6 = 0
8*(4*q-5)-7*q-r/4-6 = 0
(4*8*(4*q-5))/4+(-7*4*q)/4-r/4+(-6*4)/4 = 0
4*8*(4*q-5)-7*4*q-r-6*4 = 0
100*q-r-160-24 = 0
100*q-r-184 = 0
(100*q-r-184)/4 = 0
(100*q-r-184)/4 = 0 // * 4
100*q-r-184 = 0
x belongs to the empty set
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