Answer:
Question is not fully addressed
Step-by-step explanation:
Please put the full question otherwise, i cannot answer it
Answer:
-2x-2y-2z I think that is answer
Answer:
5 different numbers, 2 even
Step-by-step explanation:
Since we have 5 digits and they are non repeating we can use the permutation formula:

It gives us the amount of ways to arrange k objects out of n objects without repetition, but order does matter.
In our case the amount of 4 digit numbers that can be formed using the digits from 1 to 5 is: 
And out of those 5, only 2 are even
40 because 3+6+12 = 21 and 8+11+21 =40
Answer:Subtract
from both sides of the equation
from both sides of the equation
Multiply all terms by the same value to eliminate fraction denominators