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(2/3)*x-(7/3) = 4 // - 4
(2/3)*x-(7/3)-4 = 0
(2/3)*x-7/3-4 = 0
2/3*x-19/3 = 0 // + 19/3
2/3*x = 19/3 // : 2/3
x = 19/3/2/3
x = 19/2
x = 19/2
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