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(1.2/3)*x-(4*(x-(4/5)))+2/5 = 0
(1.2/3)*x-4*(x-4/5)+2/5 = 0
0.4*x-4*(x-4/5)+2/5 = 0
(-4*5*(x-4/5))/5+(0.4*5*x)/5+2/5 = 0
0.4*5*x-4*5*(x-4/5)+2 = 0
2-18*x+16 = 0
18-18*x = 0
(18-18*x)/5 = 0
(18-18*x)/5 = 0 // * 5
18-18*x = 0
18-18*x = 0 // - 18
-18*x = -18 // : -18
x = -18/(-18)
x = 1
x = 1
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