SOLUTION: explain the difference between simplyfing and evaluating 4x-6y-7x+8 x=5 y=2

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Question 364774: explain the difference between simplyfing and evaluating
4x-6y-7x+8
x=5 y=2
Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!
explain the difference between simplyfing and evaluating
4x-6y-7x+8
x=5 y=2
To simplify

4x-6y-7x+8

combine like terms:

-3x-6y+8

If all you want to do is simplify, then that is the final answer.

However if we want to evaluate that when x=5 and y=2,

we substitute (5) in place of x and (2) in place of y

-3x-6y+8

-3(5)-6(2)+8 

Then do all the operations:

-15-12+8

-19

Edwin