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x in (-oo:+oo)
(4/3)*(-2*x-8) = 8 // - 8
(4/3)*(-2*x-8)-8 = 0
4/3*(-2*x-8)-8 = 0
4/3*(-2*x-8)-8 = 0
-8/3*x-56/3 = 0
-8/3*x-56/3 = 0
-8/3*x-56/3 = 0 // + 56/3
-8/3*x = 56/3 // : -8/3
x = 56/3/(-8/3)
x = -7
x = -7
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