(-70-2+9)d + (39-75+1) = -63d -35
39 + 39 + 39 + 39 + 39 + 39 = 234
15
59
273
61
Something's missing from your question. There are 20 answers to your question. 39 + 0 = 39 38 + 1 = 39 37 + 2 = 39 . . . 19 + 20 = 39
5
2.7 - 20 + 39 = 21.7
The commutative property of addition.
-21.
90
90