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a in (-oo:+oo)
(2*a)/3+1/5 = 76 // - 76
(2*a)/3+1/5-76 = 0
2/3*a-379/5 = 0 // + 379/5
2/3*a = 379/5 // : 2/3
a = 379/5/2/3
a = 1137/10
a = 1137/10
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