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x in (-oo:+oo)
(-2/3)*(6*x-27) = -4 // + 4
(-2/3)*(6*x-27)+4 = 0
4-2/3*(6*x-27) = 0
4-2/3*(6*x-27) = 0
22-4*x = 0
22-4*x = 0
22-4*x = 0 // - 22
-4*x = -22 // : -4
x = -22/(-4)
x = 11/2
x = 11/2
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