3/9=x/7

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Solution for 3/9=x/7 equation:


x in (-oo:+oo)

3/9 = x/7 // - x/7

3/9-(x/7) = 0

1/3-1/7*x = 0 // - 1/3

-1/7*x = -1/3 // : -1/7

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

x = 7/3

x = 7/3

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