(5/7X)(X)=140

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Solution for (5/7X)(X)=140 equation: 


X in (-oo:+oo)

(5/7)*X*X = 140 // - 140

(5/7)*X*X-140 = 0

5/7*X^2 = 140 // : 5/7

X^2 = 196

X^2 = 196 // ^ 1/2

abs(X) = 14

X = 14 or X = -14

X in { 14, -14 }

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