Answer:
55 and 71
Step-by-step explanation:
Let s represent the smaller part.
s +(s +16) = 126
2s = 110
s = 55
s+16 = 71
The two parts are 55 and 71.
_____
After you work a few of these, you recognize that the two numbers will be ...
[tex]\dfrac{126}{2}\pm\dfrac{16}{2}\quad\text{half the sum plus or minus half the difference}[/tex]