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a in (-oo:+oo)
(2/3)*a = -14/33 // + -14/33
(2/3)*a-(-14/33) = 0
(2/3)*a+14/33 = 0
2/3*a+14/33 = 0 // - 14/33
2/3*a = -14/33 // : 2/3
a = -14/33/2/3
a = -7/11
a = -7/11
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