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a in (-oo:+oo)
(2/3)*a-14 = 61 // - 61
(2/3)*a-61-14 = 0
2/3*a-75 = 0 // + 75
2/3*a = 75 // : 2/3
a = 75/2/3
a = 225/2
a = 225/2
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