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(3/10)*x = 2/3 // - 2/3
(3/10)*x-(2/3) = 0
(3/10)*x-2/3 = 0
3/10*x-2/3 = 0 // + 2/3
3/10*x = 2/3 // : 3/10
x = 2/3/3/10
x = 20/9
x = 20/9
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