x/3-1=20 - solution

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Solution for x/3-1=20 equation:

x in (-oo:+oo)

x/3-1 = 20 // - 20

x/3-20-1 = 0

1/3*x-21 = 0 // + 21

1/3*x = 21 // : 1/3

x = 21/1/3

x = 63

x = 63

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