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Q: What is 39 plus 18 equals?

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-39 + 18 = -21 it is the same as saying 18-39.

-21.

7y + 18 = 39 Therefore, 7y = 39 - 18 = 21 y = 21/7 y = 3

3n+18 = 39 -4n 3n+4n = 39 -18 7n = 21 n = 3

39 + 39 + 39 + 39 + 39 + 39 = 234

18

15

18

59

273

72 but there is such a thing as a CALCULATOR

57

61

5

2.7 - 20 + 39 = 21.7

The commutative property of addition.

39 - 7y = 18,-7y = 18 - 39-7y = -21-7y/-7 = -21/-7y = 3

90

90

2+14=16

75+2(32)+4(39)+47 =75+64+156+47 =75+220+47 =122+220 =342

17 + 39 = 56

8 + 31 = 39

U = 4 x 18 U = 72

x= 119