x/21=8/4

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Solution for x/21=8/4 equation: 


x in (-oo:+oo)

x/21 = 8/4 // - 8/4

x/21-(8/4) = 0

x/21-2 = 0

1/21*x-2 = 0 // + 2

1/21*x = 2 // : 1/21

x = 2/1/21

x = 42

x = 42

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