SOLUTION: can you please help me solve by additon-or-subtraction method: (((2x+y=18 2x-y=22)))

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Question 154842This question is from textbook Algebra structure and method book 1
: can you please help me solve by additon-or-subtraction method: (((2x+y=18 2x-y=22))) This question is from textbook Algebra structure and method book 1

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.2x%2By=18
2.2x-y=22
Add eq. 1 to eq. 2 to get rid of y.
%282x%2By%29%2B%282x-y%29=18%2B22
4x=40
highlight%28x=10%29
Now go to either 1 or 2 and solve for y.
I'll choose 1.
1.2x%2By=18
2%2810%29%2By=18
20%2By=18
highlight%28y=-2%29