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(1/2)*(2*x-1) = -1/5-(2/5) // + -1/5-(2/5)
(1/2)*(2*x-1)-(-1/5)+2/5 = 0
(1/2)*(2*x-1)+1/5+2/5 = 0
1/2*(2*x-1)+1/5+2/5 = 0
(1/2*5*(2*x-1))/5+1/5+2/5 = 0
1/2*5*(2*x-1)+1+2 = 0
5*x-3/2+2 = 0
5*x+1/2 = 0
(5*x+1/2)/5 = 0
(5*x+1/2)/5 = 0 // * 5
5*x+1/2 = 0
5*x+1/2 = 0 // - 1/2
5*x = -1/2 // : 5
x = -1/2/5
x = -1/10
x = -1/10
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