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(4/7)*(x-3) = 5/3 // - 5/3
(4/7)*(x-3)-(5/3) = 0
(4/7)*(x-3)-5/3 = 0
4/7*(x-3)-5/3 = 0
(4/7*3*(x-3))/3-5/3 = 0
4/7*3*(x-3)-5 = 0
12/7*x-71/7 = 0
(12/7*x-71/7)/3 = 0
(12/7*x-71/7)/3 = 0 // * 3
12/7*x-71/7 = 0
12/7*x-71/7 = 0 // + 71/7
12/7*x = 71/7 // : 12/7
x = 71/7/12/7
x = 71/12
x = 71/12
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