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a in (-oo:+oo)
(2*a)/8 = 35/4 // - 35/4
(2*a)/8-(35/4) = 0
(2*a)/8-35/4 = 0
1/4*a-35/4 = 0 // + 35/4
1/4*a = 35/4 // : 1/4
a = 35/4/1/4
a = 35
a = 35
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