Q: How do you work out 3x-7?

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3x7

I think 7x3 is = to 21

7x3 or 3x7, which is all you can do to multiply to get 21.

23 Prime numbers are odd numbers and 21=3x7

You take 3x7+4=25 :)

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3x7 = 21

y = -1/(3x7 + 2x - 9)y = -(3x7 + 2x - 9)-1y' = -(-1)(3x7 + 2x - 9)-2(3x7 + 2x - 9)'y' = (3x7 + 2x - 9)-2(21x6 + 2)y' = (21x6 + 2)/(3x7 + 2x - 9)2

if you do 3x7 and you need to get 6x7 then just do it 2 times

3x7

3(7 + 2) = 3x7 + 3x2 is an example of the distributive law.The distributive law connects multiplication and addition.

2x7 = 14 x7 = 7 3x7 = 3*7 = 21

21

133

41

-21

3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.

21x1 and 3x7