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g in (-oo:+oo)
(5*(7*g+6))/4 = 77.5 // - 77.5
(5*(7*g+6))/4-77.5 = 0
(5*(7*g+6))/4+(-77.5*4)/4 = 0
5*(7*g+6)-77.5*4 = 0
35*g-280 = 0
(35*g-280)/4 = 0
(35*g-280)/4 = 0 // * 4
35*g-280 = 0
35*g-280 = 0 // + 280
35*g = 280 // : 35
g = 280/35
g = 8
g = 8
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