Cos(60)=x/9

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Solution for Cos(60)=x/9 equation: 


x in (-oo:+oo)

cos(60) = x/9 // - x/9

cos(60)-(x/9) = 0

cos(60)-1/9*x = 0 // - cos(60)

-1/9*x = -cos(60) // : -1/9

x = -cos(60)/(-1/9)

x = 9*cos(60)

x = 9*cos(60)

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