1/7=x-3/21

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Solution for 1/7=x-3/21 equation: 


x in (-oo:+oo)

1/7 = x-(3/21) // - x-(3/21)

1/7-x+3/21 = 0

2/7-x = 0 // - 2/7

-x = -2/7 // * -1

x = 2/7

x = 2/7

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