if 3+x / 7+x = 3/7 + 3/7, then x= what

Don't post the same question using different names please.

ok

Well, the spacing makes me interpret this as (3+x)/(7+x) = 3/7 + 3/7 I still suspect a typo on the right side, but now at least we have (3+x)/(7+x) = 6/7 7(3+x) = 6(7+x) 21+7x = 42+6x x = 21

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