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Q: 3 x 7 plus y equals 21?

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It's 21.

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

x=3 actually its 7

x2 + 10x + 21 = (x + 3)(x + 7)

-3/7

9a+21 3(3a+7)

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

7+(7*3) because 7*3=21 and 21+7=28, which is equal to 28, the product of 4*7.

96

(z=-3) and (z=7)

3x + 7 = -4x + 28 implies 7x + 7 = 28

89

1 time 21; 3 times 7; 7 times 3; 21times 1

7 + 21 + 2 + 86 + 4 = 120

2/3 + 1/7 + 4/6 = 14/21 + 3/21 + 14/21 = 31/21 = 1 10/21

x=3 actually its 7

If x/3 = 7 then the value of x is 21

21

21

5 + 2 + 3 + 7 + (21/7) = 20

n = 7. 3(7) + 7 = 28. 21+7=28

4 plus 3 equals 7

96

The patterns is formed from the product of the first number and the absolute difference of the two numbers. 1 x l4 - 1l = 1 x 3 = 3 3 x l7 - 3l = 3 x 4 = 12 6 x l5 - 6l = 6 x 1 = 6 7 x l10 - 7l = 7 x 3 = 21 11 x l7 - 11l = 11 x 4 = 44

13/21 - 7/21 = 6/21 Sorry, DJ, 4 over 7 = 12/21 so answer is 5/21