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(10/3)*x-x+4 = 4/7 // - 4/7
(10/3)*x-x-(4/7)+4 = 0
(10/3)*x-x-4/7+4 = 0
7/3*x+24/7 = 0 // - 24/7
7/3*x = -24/7 // : 7/3
x = -24/7/7/3
x = -72/49
x = -72/49
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