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2*x-((1/5)*x)+5/9 = 181/180 // - 181/180
2*x-((1/5)*x)+5/9-(181/180) = 0
(-1/5)*x+2*x+5/9-181/180 = 0
9/5*x-9/20 = 0 // + 9/20
9/5*x = 9/20 // : 9/5
x = 9/20/9/5
x = 1/4
x = 1/4
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