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(5*x)/2-4 = (2*x-7)/9 // - (2*x-7)/9
(5*x)/2-((2*x-7)/9)-4 = 0
(-1*(2*x-7))/9+(5*x)/2-4 = 0
(-1*2*(2*x-7))/(2*9)+(5*9*x)/(2*9)+(-4*2*9)/(2*9) = 0
5*9*x-1*2*(2*x-7)-4*2*9 = 0
41*x-72+14 = 0
41*x-58 = 0
(41*x-58)/(2*9) = 0
(41*x-58)/(2*9) = 0 // * 2*9
41*x-58 = 0
41*x-58 = 0 // + 58
41*x = 58 // : 41
x = 58/41
x = 58/41
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