SOLUTION: Please help me solve this: 3x-y=11 x+y=5 in elimination and substitution method.

Question 687304: Please help me solve this: 3x-y=11 x+y=5 in elimination and substitution method.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
3x-y=11 x+y=5 in elimination and substitution method.
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Elimination:
3x-y =11
x +y =5
-----
Add and solve for "x":
4x = 16
x = 4
----
Solve for "y" using x + y = 5
4 + y = 5
y = 1
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Substitution:
3x-y =11
x +y =5
-----
Solve the bottom equation for "x":
x = 5-y
Substitute into the top equation to solve for "y":
3(5-y) - y = 11
15 - 3y -y = 11
-4y = -4
y = 1
----
solve for "x" using x = 5-y
x = 5-1 = 4
====================
cheers,
Stan H.
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