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g in (-oo:+oo)
g/0.21 = (3*g)/1.05+2 // - (3*g)/1.05+2
g/0.21-((3*g)/1.05)-2 = 0
g/0.21-2.85714286*g-2 = 0
1.9047619*g-2 = 0 // + 2
1.9047619*g = 2 // : 1.9047619
g = 2/1.9047619
g = 1.05
g = 1.05
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