x/7+x/3=20 - solution

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Solution for x/7+x/3=20 equation:

x in (-oo:+oo)

x/7+x/3 = 20 // - 20

x/7+x/3-20 = 0

10/21*x-20 = 0 // + 20

10/21*x = 20 // : 10/21

x = 20/10/21

x = 42

x = 42

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