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w in (-oo:+oo)
(-2/3)*(w-(4/9)) = 5/4 // - 5/4
(-2/3)*(w-(4/9))-(5/4) = 0
(-2/3)*(w-4/9)-5/4 = 0
-2/3*(w-4/9)-5/4 = 0
(-2/3*4*(w-4/9))/4-5/4 = 0
-2/3*4*(w-4/9)-5 = 0
-8/3*w-103/27 = 0
(-8/3*w-103/27)/4 = 0
(-8/3*w-103/27)/4 = 0 // * 4
-8/3*w-103/27 = 0
-8/3*w-103/27 = 0 // + 103/27
-8/3*w = 103/27 // : -8/3
w = 103/27/(-8/3)
w = -103/72
w = -103/72
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