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(2*x+4)/5-(x/2)+4 = 0
(2*x+4)/5-x/2+4 = 0
(2*(2*x+4))/(2*5)+(5*(-x))/(2*5)+(2*4*5)/(2*5) = 0
2*(2*x+4)+5*(-x)+2*4*5 = 0
8-x+40 = 0
48-x = 0
(48-x)/(2*5) = 0
(48-x)/(2*5) = 0 // * 2*5
48-x = 0
48-x = 0 // - 48
-x = -48 // * -1
x = 48
x = 48
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