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Q in (-oo:+oo)
Q/54 = 2/9 // - 2/9
Q/54-(2/9) = 0
Q/54-2/9 = 0
1/54*Q-2/9 = 0 // + 2/9
1/54*Q = 2/9 // : 1/54
Q = 2/9/1/54
Q = 12
Q = 12
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