Cos2x=1/7

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Solution for Cos2x=1/7 equation: 


x-(0.5*75*z);y-(2*x);y-(16.7*(3*z+2.2))

-(d/5)-2 < 23

-(d/5)-2 = 0

(1/9)*a^2-((4/5)*b^2) = 0

7/6-1 = 0

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