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Anonymous
x - 7 = 13
Therefore, x = 13 + 7
x = 20
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21x21 equals 7x7x9
91 x 1 or 13 x7
x=6=x=5+x=13+x=20 x cannot = x+5. This question has no answer.
That's a total of 378
x/13 = 15 x = 15(13) x = 195