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x in (-oo:+oo)
(4/3)*x = 27/64 // - 27/64
(4/3)*x-(27/64) = 0
(4/3)*x-27/64 = 0
4/3*x-27/64 = 0 // + 27/64
4/3*x = 27/64 // : 4/3
x = 27/64/4/3
x = 81/256
x = 81/256
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