7
The answer to 12 P plus 7 times 139 equals 39. This is taught in high school math.
273
The commutative property of addition.
90
39 + 39 + 39 + 39 + 39 + 39 = 234
-21
7
The answer to 12 P plus 7 times 139 equals 39. This is taught in high school math.
-21
15
59
273
61
5
2.7 - 20 + 39 = 21.7
The commutative property of addition.