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(6*(2-x))/5 = -x // + x
(6*(2-x))/5+x = 0
(6*(2-x))/5+(5*x)/5 = 0
6*(2-x)+5*x = 0
12-x = 0
(12-x)/5 = 0
(12-x)/5 = 0 // * 5
12-x = 0
12-x = 0 // - 12
-x = -12 // * -1
x = 12
x = 12
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