21-x/4=x/4

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Solution for 21-x/4=x/4 equation: 


x in (-oo:+oo)

21-(x/4) = x/4 // - x/4

21-(x/4)-(x/4) = 0

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

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

x = -21/(-1/2)

x = 42

x = 42

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