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a in (-oo:+oo)
-3*a-3 = -14/3 // + -14/3
-3*a-(-14/3)-3 = 0
14/3-3*a-3 = 0
5/3-3*a = 0 // - 5/3
-3*a = -5/3 // : -3
a = -5/3/(-3)
a = 5/9
a = 5/9
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