4/10=2x/10x-10

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Solution for 4/10=2x/10x-10 equation: 


x in (-oo:+oo)

4/10 = ((2*x)/10)*x-10 // - ((2*x)/10)*x-10

4/10-(((2*x)/10)*x)+10 = 0

(-1/5)*x^2+4/10+10 = 0

-1/5*x^2 = -52/5 // : -1/5

x^2 = 52

x^2 = 52 // ^ 1/2

abs(x) = 2*13^(1/2)

x = 2*13^(1/2) or x = -(2*13^(1/2))

x in { 2*13^(1/2), -(2*13^(1/2)) }

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