Q: What is 7 minus 21?

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4/3 minus 5/7 = 13/21

12/21 - 7/21 = 5/21

1/3 minus 1/7 is 4/21.

Seven and minus three; 7*(-3) = -21 & 7 + (-3) = 4.

33/7 - 22/21 the least common denominator is 21 = (33 x 3)/(7 x 3) - 22/21 = 99/21 - 22/21 = 77/21 = (77 ÷ 7/(21 ÷ 7) = 11/3 =3 2/3

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It is: 28-21 = 7

- 21

25 + 16 - 13 - 21 = 7

21

4/3 minus 5/7 = 13/21

x2 - 4x - 21 = (x-7)(x+3)

19/21 - 2/7 = 19/21 - 6/21 = 13/21

12/21 - 7/21 = 5/21

6/7 minus 2/6 is 11/21

1/3 minus 1/7 is 4/21.

6/7 - 2/3 = 18/21 - 14/21 = 4/21

6/7 - 2/3 = 18/21 - 14/21 = 4/21