SOLUTION: Solve by addition method 7x-4y=13 -7x+6y=-11

Question 275129: Solve by addition method
7x-4y=13
-7x+6y=-11
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
This can be done as follows:
7x-4y=13
-7x+6y=-11 Add both of these to get:
2y=2 Divide both sides by 2 to get:
y=1 Now we can plug this answer into the original equation:
7x-4=13 Add 4 and divide both sides by 7 to get:
x=17/7
Check it out to see if both of these work in the two equations above.
RJ
Also check out a new book that might help at
www.math-unlock.com
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