5/7=x+2/21

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Solution for 5/7=x+2/21 equation: 


x in (-oo:+oo)

5/7 = x+2/21 // - x+2/21

5/7-x-(2/21) = 0

5/7-x-2/21 = 0

13/21-x = 0 // - 13/21

-x = -13/21 // * -1

x = 13/21

x = 13/21

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