x/2x+x=210

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Solution for x/2x+x=210 equation: 


x in (-oo:+oo)

(x/2)*x+x = 210 // - 210

(x/2)*x+x-210 = 0

1/2*x^2+x-210 = 0

DELTA = 1^2-(-210*1/2*4)

DELTA = 421

DELTA > 0

x = (421^(1/2)-1)/(1/2*2) or x = (-421^(1/2)-1)/(1/2*2)

x = 421^(1/2)-1 or x = -(421^(1/2)+1)

x in { -(421^(1/2)+1), 421^(1/2)-1 }

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