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a in (-oo:+oo)
(2/3)*(8*a-15) = 7/9 // - 7/9
(2/3)*(8*a-15)-(7/9) = 0
(2/3)*(8*a-15)-7/9 = 0
2/3*(8*a-15)-7/9 = 0
(2/3*9*(8*a-15))/9-7/9 = 0
2/3*9*(8*a-15)-7 = 0
48*a-97 = 0
(48*a-97)/9 = 0
(48*a-97)/9 = 0 // * 9
48*a-97 = 0
48*a-97 = 0 // + 97
48*a = 97 // : 48
a = 97/48
a = 97/48
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