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5-((3*a-4)/5) = 7-((2*a)/2) // - 7-((2*a)/2)
(2*a)/2-((3*a-4)/5)-7+5 = 0
(-1*(3*a-4))/5+a-7+5 = 0
(-1*(3*a-4))/5+(5*a)/5+(-7*5)/5+(5^2)/5 = 0
5*a-1*(3*a-4)-7*5+25 = 0
2*a-35+4+25 = 0
2*a-31+25 = 0
2*a-6 = 0
(2*a-6)/5 = 0
(2*a-6)/5 = 0 // * 5
2*a-6 = 0
2*a-6 = 0 // + 6
2*a = 6 // : 2
a = 6/2
a = 3
a = 3
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