42/w=56/8

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Solution for 42/w=56/8 equation: 


D( w )

w = 0

w = 0

w = 0

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

42/w = 56/8 // - 56/8

42/w-(56/8) = 0

42/w-7 = 0

42*w^-1 = 7 // : 42

w^-1 = 1/6

-1 < 0

1/(w^1) = 1/6 // * w^1

1 = 1/6*w^1 // : 1/6

6 = w^1

w = 6

w = 6

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