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(2/3)*x-(7/10) = 7/5 // - 7/5
(2/3)*x-(7/10)-(7/5) = 0
(2/3)*x-7/10-7/5 = 0
2/3*x-21/10 = 0 // + 21/10
2/3*x = 21/10 // : 2/3
x = 21/10/2/3
x = 63/20
x = 63/20
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