Let x and y be the two numbers. We have:

Subtract the first equation from the second to get

And deduce

The two numbers are 3 and 11.
Answer:
y = 12
Step-by-step explanation:
A line parallel to y = 6 is, like y = 6, horizontal. Such a line passing through (10,12) is y = 12.
AWNSER: B or 54
Hope this helps and Happy Friday!