-81=9/4x

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Solution for -81=9/4x equation: 


x in (-oo:+oo)

-81 = (9/4)*x // - (9/4)*x

-((9/4)*x)-81 = 0

(-9/4)*x-81 = 0

-9/4*x-81 = 0 // + 81

-9/4*x = 81 // : -9/4

x = 81/(-9/4)

x = -36

x = -36

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