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a in (-oo:+oo)
a/8 = 5*a-234 // - 5*a-234
a/8-(5*a)+234 = 0
a/8-5*a+234 = 0
234-39/8*a = 0 // - 234
-39/8*a = -234 // : -39/8
a = -234/(-39/8)
a = 48
a = 48
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