SOLUTION: Solving Systems of Linear Equations by the Substitution Method. I am having a difficult time understanding how to do this. I was hoping someone could help me. The problem is:

Question 135393This question is from textbook Essentials of Elementary Algebra
: Solving Systems of Linear Equations by the Substitution Method.
I am having a difficult time understanding how to do this. I was hoping someone could help me.
The problem is: y=x-3 x+y=5

x+x-3=5 if I am reading the problem right.
But I am not sure where to go after that.
Will you please help me understand this? Thank you! This question is from textbook Essentials of Elementary Algebra

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The problem is:
y=x-3
x+y=5
--------
You are told that y = x-3 so substitute that into the 2nd equation
to get:
x+(x-3) = 5
2x-3=5
2x = 8
x = 4
-----------
Now, since y = x-3, substitute to get:
y = 4-3 = 1
----------------
Solution: (4,1)
==================
Cheers,
Stan H.

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