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x in (-oo:+oo)
(-4/9)*(2*x-4) = 18 // - 18
(-4/9)*(2*x-4)-18 = 0
-4/9*(2*x-4)-18 = 0
-4/9*(2*x-4)-18 = 0
-8/9*x-146/9 = 0
-8/9*x-146/9 = 0
-8/9*x-146/9 = 0 // + 146/9
-8/9*x = 146/9 // : -8/9
x = 146/9/(-8/9)
x = -73/4
x = -73/4
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