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a in (-oo:+oo)
a-(7*a)-3/8 = 103/24 // - 103/24
a-(7*a)-3/8-(103/24) = 0
a-7*a-3/8-103/24 = 0
-6*a-14/3 = 0 // + 14/3
-6*a = 14/3 // : -6
a = 14/3/(-6)
a = -7/9
a = -7/9
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