21=x/3+8 - solution

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Solution for 21=x/3+8 equation:

x in (-oo:+oo)

21 = x/3+8 // - x/3+8

21-(x/3)-8 = 0

13-1/3*x = 0 // - 13

-1/3*x = -13 // : -1/3

x = -13/(-1/3)

x = 39

x = 39

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