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Q: What is 6b plus 21 equals 7b-21 equal to?

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63 plus 47 plus 42 plus 21 is equal to 173.

No because it contains an equal sign in it.

Multiply the first equation by 3 to give 9x + 15y = 21

The mathematical statement 31 plus 21 equals 52 as a total.

21+21+19+19=80

This is not correct. If x=11, then 9+x=20. In order for 9+x=21 to be correct, x would have to be equal to 12.

The statement 10 plus 21 equals 31 in total. It can also be written as 10 + 21 = 31.

11 plus 5-10 plus 20-9 plus 14-10 is equal to 21

273 13+8 = 21 and 13*21 = 273

12 plus 9 equals 21.

The answer is 21 because if 21 is divided by 3 it equals 7 plus 4 equals 11.

5

21 + 21 = 42.

66.

25 plus 21 plus 19 is equal to 65.

As written, that's 4x squared = -21 and x equals the square root of -21/4. But if you meant that to be 12x, it factors out nicely to (2x + 3)(2x + 3) and x would equal -3/2

Commutativity or Abelian property

21

identity

69 + 21 = 90

21 + 10 = 31

21

21

21

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