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(3/4)*x = 213/6 // - 213/6
(3/4)*x-(213/6) = 0
(3/4)*x-71/2 = 0
3/4*x-71/2 = 0 // + 71/2
3/4*x = 71/2 // : 3/4
x = 71/2/3/4
x = 142/3
x = 142/3
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