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g in (-oo:+oo)
(3*g+40)/5 = (4*g-8)/4 // - (4*g-8)/4
(3*g+40)/5-((4*g-8)/4) = 0
(3*g+40)/5+(-1*(4*g-8))/4 = 0
(4*(3*g+40))/(4*5)+(-1*5*(4*g-8))/(4*5) = 0
4*(3*g+40)-1*5*(4*g-8) = 0
200-8*g = 0
(200-8*g)/(4*5) = 0
(200-8*g)/(4*5) = 0 // * 4*5
200-8*g = 0
200-8*g = 0 // - 200
-8*g = -200 // : -8
g = -200/(-8)
g = 25
g = 25
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