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(1/5)*(2*x+5) = X+2/9 // - X+2/9
(1/5)*(2*x+5)-X-(2/9) = 0
(1/5)*(2*x+5)-X-2/9 = 0
1/5*(2*x+5)-X-2/9 = 0
(1/5*9*(2*x+5))/9+(9*(-X))/9-2/9 = 0
1/5*9*(2*x+5)+9*(-X)-2 = 0
18/5*x-9*X-2+9 = 0
18/5*x-9*X+7 = 0
(18/5*x-9*X+7)/9 = 0
(18/5*x-9*X+7)/9 = 0 // * 9
18/5*x-9*X+7 = 0
18/5*x-9*X+7 = 0 // - 7-9*X
18/5*x = -(7-9*X) // : 18/5
x = (-(7-9*X))/18/5
x = -5/18*(7-9*X)
x = -5/18*(7-9*X)
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