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3*x-(2/5) = (-7/5)*x-(5/2) // - (-7/5)*x-(5/2)
3*x-((-7/5)*x)-(2/5)+5/2 = 0
3*x+(7/5)*x-2/5+5/2 = 0
22/5*x+21/10 = 0 // - 21/10
22/5*x = -21/10 // : 22/5
x = -21/10/22/5
x = -21/44
x = -21/44
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