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x in (-oo:+oo)
(-4/9)*(x-(1/4)) = 3/7 // - 3/7
(-4/9)*(x-(1/4))-(3/7) = 0
(-4/9)*(x-1/4)-3/7 = 0
-4/9*(x-1/4)-3/7 = 0
(-4/9*7*(x-1/4))/7-3/7 = 0
-4/9*7*(x-1/4)-3 = 0
-28/9*x-20/9 = 0
(-28/9*x-20/9)/7 = 0
(-28/9*x-20/9)/7 = 0 // * 7
-28/9*x-20/9 = 0
-28/9*x-20/9 = 0 // + 20/9
-28/9*x = 20/9 // : -28/9
x = 20/9/(-28/9)
x = -5/7
x = -5/7
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