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(3/5)*x+9 = 24/5 // - 24/5
(3/5)*x-(24/5)+9 = 0
(3/5)*x-24/5+9 = 0
3/5*x+21/5 = 0 // - 21/5
3/5*x = -21/5 // : 3/5
x = -21/5/3/5
x = -7
x = -7
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