1/9=x/7

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Solution for 1/9=x/7 equation: 


x in (-oo:+oo)

1/9 = x/7 // - x/7

1/9-(x/7) = 0

1/9-1/7*x = 0 // - 1/9

-1/7*x = -1/9 // : -1/7

x = -1/9/(-1/7)

x = 7/9

x = 7/9

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