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(2/3)*x+4 = 53/15 // - 53/15
(2/3)*x-(53/15)+4 = 0
(2/3)*x-53/15+4 = 0
2/3*x+7/15 = 0 // - 7/15
2/3*x = -7/15 // : 2/3
x = -7/15/2/3
x = -7/10
x = -7/10
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