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x in (-oo:+oo)
(-7/12)*x-(1/4) = 2/3 // - 2/3
(-7/12)*x-(1/4)-(2/3) = 0
(-7/12)*x-1/4-2/3 = 0
-7/12*x-11/12 = 0 // + 11/12
-7/12*x = 11/12 // : -7/12
x = 11/12/(-7/12)
x = -11/7
x = -11/7
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