21-x/4=x/3 - solution

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Solution for 21-x/4=x/3 equation:

x in (-oo:+oo)

21-(x/4) = x/3 // - x/3

21-(x/4)-(x/3) = 0

21-7/12*x = 0 // - 21

-7/12*x = -21 // : -7/12

x = -21/(-7/12)

x = 36

x = 36

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