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x in (-oo:+oo)
(1/2)*(2*x+54) = (1/3)*(9*x+27)-4 // - (1/3)*(9*x+27)-4
(1/2)*(2*x+54)-((1/3)*(9*x+27))+4 = 0
(1/2)*(2*x+54)+(-1/3)*(9*x+27)+4 = 0
1/2*(2*x+54)-1/3*(9*x+27)+4 = 0
1/2*(2*x+54)-1/3*(9*x+27)+4 = 0
4-2*x+18 = 0
22-2*x = 0
22-2*x = 0
22-2*x = 0 // - 22
-2*x = -22 // : -2
x = -22/(-2)
x = 11
x = 11
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