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a in (-oo:+oo)
5/1-((2*(3*a-4))/5) = 7-((2*a)/2) // - 7-((2*a)/2)
(2*a)/2-((2*(3*a-4))/5)+5/1-7 = 0
(-2/5)*(3*a-4)+(2*a)/2-7+5 = 0
a-2/5*(3*a-4)-7+5 = 0
a-2/5*(3*a-4)-7+5 = 0
8/5-1/5*a-7+5 = 0
5-1/5*a-27/5 = 0
-1/5*a-2/5 = 0
-1/5*a-2/5 = 0
-1/5*a-2/5 = 0 // + 2/5
-1/5*a = 2/5 // : -1/5
a = 2/5/(-1/5)
a = -2
a = -2
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