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(4-5*x)/5+9/5 = (-7*x)/2 // - (-7*x)/2
(4-5*x)/5-((-7*x)/2)+9/5 = 0
(4-5*x)/5+(7/2)*x+9/5 = 0
(4-5*x)/5+(7*x)/2+9/5 = 0
(2*(4-5*x))/(2*5)+(5*7*x)/(2*5)+(2*9)/(2*5) = 0
2*(4-5*x)+5*7*x+2*9 = 0
25*x+8+18 = 0
25*x+26 = 0
(25*x+26)/(2*5) = 0
(25*x+26)/(2*5) = 0 // * 2*5
25*x+26 = 0
25*x+26 = 0 // - 26
25*x = -26 // : 25
x = -26/25
x = -26/25
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