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(1/5)*(4*x+2) = 2/3 // - 2/3
(1/5)*(4*x+2)-(2/3) = 0
(1/5)*(4*x+2)-2/3 = 0
1/5*(4*x+2)-2/3 = 0
(1/5*3*(4*x+2))/3-2/3 = 0
1/5*3*(4*x+2)-2 = 0
12/5*x-4/5 = 0
(12/5*x-4/5)/3 = 0
(12/5*x-4/5)/3 = 0 // * 3
12/5*x-4/5 = 0
12/5*x-4/5 = 0 // + 4/5
12/5*x = 4/5 // : 12/5
x = 4/5/12/5
x = 1/3
x = 1/3
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