(X-20)/X=0.3

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Solution for (X-20)/X=0.3 equation: 


D( X )

X = 0

X = 0

X = 0

X in (-oo:0) U (0:+oo)

(X-20)/X = 0.3 // - 0.3

(X-20)/X-0.3 = 0

(X-20)/X+(-0.3*X)/X = 0

X-0.3*X-20 = 0

0.7*X-20 = 0

(0.7*X-20)/X = 0

(0.7*X-20)/X = 0 // * X

0.7*X-20 = 0

0.7*X-20 = 0 // + 20

0.7*X = 20 // : 0.7

X = 20/0.7

X = 28.57142857

X = 28.57142857

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