1+38 = 39
21+18=39
38 + 1 = 39
37 + 2 = 39
36 + 3 = 39
35 + 4 = 39
. . . .
Etcetera until
20 + 19 = 39
All of these satisfy "what plus what equals 39"
If you want to consider negative numbers:
40 + -1 = 39
41 + -2 = 39
etcetera
=
i say it is 58+x=39 Step 1: Simplify both sides of the equation.
x+58=39
Step 2: Subtract 58 from both sides.
x+58−58=39−58
x=−19
20+24
6x8
ds'
39 + 39 + 39 + 39 + 39 + 39 = 234
15
59
273
61
5
2.7 - 20 + 39 = 21.7
The commutative property of addition.
-21.
90
90
75+2(32)+4(39)+47 =75+64+156+47 =75+220+47 =122+220 =342