25/30x - 6/30x + 4 = 21/30x
4 = 21/30x - 19/30x
4 = 2/30x
4/(2/30) = x
4 * (30/2) = x
120/2 = x
60 = x
Substitute 60 for x to see if my solution is correct.
Thanks for the help :)
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