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21+21+19+19=80

19 plus 10 equals 29.

2n plus 7 equals 19 2n equals 12 n equals 6

4x plus 7 plus 3x equals 19 plus xx = 2

53+19

19 plus 54 equals 73. when you subtract like this x+19=73 X+19=73 -19 -73 0 54

19 + 43 + 13 = 75

19

14 + 19 = 33

It is: 55+19 = 74

-2

48

x equals 19

20

Commutative property of addition.

105.

19

19.

No.

-8 + 19 = 11

48

That equals 199

yes

4x-14

59