48/8=42/x

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Solution for 48/8=42/x equation: 


D( x )

x = 0

x = 0

x = 0

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

48/8 = 42/x // - 42/x

48/8-(42/x) = 0

48/8-42*x^-1 = 0

-42*x^-1 = -6 // : -42

x^-1 = 1/7

-1 < 0

1/(x^1) = 1/7 // * x^1

1 = 1/7*x^1 // : 1/7

7 = x^1

x = 7

x = 7

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