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1/5-((5/6)*x) = -89/180 // + -89/180
1/5-((5/6)*x)-(-89/180) = 0
(-5/6)*x+1/5+89/180 = 0
25/36-5/6*x = 0 // - 25/36
-5/6*x = -25/36 // : -5/6
x = -25/36/(-5/6)
x = 5/6
x = 5/6
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