4/21+2/9=x - solution

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Solution for 4/21+2/9=x equation:

x in (-oo:+oo)

4/21+2/9 = x // - x

4/21-x+2/9 = 0

26/63-x = 0 // - 26/63

-x = -26/63 // * -1

x = 26/63

x = 26/63

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