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(1/3)*(x+2) = 2*x-(20*(1-x))-1 // - 2*x-(20*(1-x))-1
(1/3)*(x+2)+20*(1-x)-(2*x)+1 = 0
(1/3)*(x+2)+20*(1-x)-2*x+1 = 0
1/3*(x+2)+20*(1-x)-2*x+1 = 0
1/3*(x+2)+20*(1-x)-2*x+1 = 0
1-59/3*x-2*x+62/3 = 0
1-65/3*x+62/3 = 0
65/3-65/3*x = 0
65/3-65/3*x = 0
65/3-65/3*x = 0 // - 65/3
-65/3*x = -65/3 // : -65/3
x = -65/3/(-65/3)
x = 1
x = 1
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