There are 10 possible digits and 26 possible letters.
To find the answer to this problem we have to multiply 9 as many digits has the hotel reservation number and 26 as many letters it has.
It means:

There are 1,119,214,746 possible reservation numbers.
Y=1+x
Y=11-x
1+x=11-x
2x=10
X=5
1+5=11-5
6=6
Y=6
Answer:
I'm assuming you want to solve for each variable. There isn't much to do for your question.
We want x:
x + y = 12
Subtract y to get x alone.
x = 12-y
We want y:
x+y=12
Subtract x to get y alone.
y = 12-x
Answer:
25%
Step-by-step explanation:
To change a fraction to a percentage multiply the fraction by 100%, thus
× 100%
=
= 25%