4/7+x=-2/21 - solution

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Solution for 4/7+x=-2/21 equation:

x in (-oo:+oo)

x+4/7 = -2/21 // + -2/21

x+4/7-(-2/21) = 0

x+4/7+2/21 = 0

x+2/3 = 0 // - 2/3

x = -2/3

x = -2/3

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