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a in (-oo:+oo)
(4*(2*a-1))/9.6 = 10 // - 10
(4*(2*a-1))/9.6-10 = 0
(4*(2*a-1))/9.6+(-10*9.6)/9.6 = 0
4*(2*a-1)-10*9.6 = 0
8*a-100 = 0
(8*a-100)/9.6 = 0
(8*a-100)/9.6 = 0 // * 9.6
8*a-100 = 0
8*a-100 = 0 // + 100
8*a = 100 // : 8
a = 100/8
a = 25/2
a = 25/2
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