x/3+6=13 - solution

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Solution for x/3+6=13 equation:

x in (-oo:+oo)

x/3+6 = 13 // - 13

x/3-13+6 = 0

1/3*x-7 = 0 // + 7

1/3*x = 7 // : 1/3

x = 7/1/3

x = 21

x = 21

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