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1/3 = (-1/2)*x-(3/5) // - (-1/2)*x-(3/5)
1/3-((-1/2)*x)+3/5 = 0
(1/2)*x+1/3+3/5 = 0
1/2*x+14/15 = 0 // - 14/15
1/2*x = -14/15 // : 1/2
x = -14/15/1/2
x = -28/15
x = -28/15
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