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Q: What property is 8 plus 20 plus 12 equals 8 plus 12 plus 20?

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distributive

12 + 16 + 18 + 20 + 9 = 75

1 plus 19 equals 20 2 plus 18 equals 20 3 plus 17 equals 20 4 plus 16 equals 20 5 plus 15 equals 20 6 plus 14 equals 20 7 plus 13 equals 20 8 plus 12 equals 20 9 plus 11 equals 20 10 plus 10 equals 20 1 times 20 equals 20 2 times 10 equals 20 4 times 5 equals 20

12 of course !

10 plus 10 equals 20 20 divide by 10 equals 2 2 plus 10 equals 12

I come up with 20.

20+6=6+20

645375

4

If: 4x+(-12) = 8 then 4x = 20 and x = 5

x = -4 and y = 4

any number plus 0 equals the previously said number 20+0=20 demonstrates the zero property

20 plus 20 equals 4020 plus 20 = 40

Yes.

-12

(12 + 8) + 3 = 12 + (8 + 3)20 + 3 = 12 + 1123 = 23 ■

A=20 20+12=32 32divided by 4 = 8

add; 5x =20 so x = 4

20 + 12 + 32 + 20 + 30 + 72 = 186

It is the commutative property as well as the associative property. Without the second, the equality need not hold.

3x + x + 8 = 204x + 8 = 204x = 12x = 3

205

Add the two equations you get 5y = 60 so y = 12 and x = 2

Negative 15 plus positive 20 equals 20 minus 15, which equals 5.

20 percent is equivalent to .20 multiply 280 by .20 equals 56 280 plus 56 equals 336