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(2/5)*(10*x+25) = 8-(9*n)-(5*n) // - 8-(9*n)-(5*n)
(2/5)*(10*x+25)+9*n+5*n-8 = 0
2/5*(10*x+25)+9*n+5*n-8 = 0
2/5*(10*x+25)+9*n+5*n-8 = 0
9*n+5*n+4*x-8+10 = 0
14*n+4*x-8+10 = 0
14*n+4*x+2 = 0
14*n+4*x+2 = 0
14*n+4*x+2 = 0 // - 14*n+2
4*x = -(14*n+2) // : 4
x = (-(14*n+2))/4
x = (-(14*n+2))/4
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