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2/5 = (-3/7)*x-(2*x)+2/5 // - (-3/7)*x-(2*x)+2/5
2*x-((-3/7)*x)+2/5-(2/5) = 0
(3/7)*x+2*x+2/5-2/5 = 0
17/7*x = 0 // : 17/7
x = 0
x = 0
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