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(3/4)*x+(4/5)*x+5/9 = -2969/180 // + -2969/180
(3/4)*x+(4/5)*x+5/9-(-2969/180) = 0
(3/4)*x+(4/5)*x+5/9+2969/180 = 0
31/20*x+341/20 = 0 // - 341/20
31/20*x = -341/20 // : 31/20
x = -341/20/31/20
x = -11
x = -11
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