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1/5 = (-3/2)*x-(4/7) // - (-3/2)*x-(4/7)
1/5-((-3/2)*x)+4/7 = 0
(3/2)*x+1/5+4/7 = 0
3/2*x+27/35 = 0 // - 27/35
3/2*x = -27/35 // : 3/2
x = -27/35/3/2
x = -18/35
x = -18/35
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