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Question 196596: Solve this system using the Addition Method, describe in words the steps you will take to do that.
3x - y = -1
4x + 2y = 22
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Solve this system using the Addition Method, describe in words the steps you will take to do that.
3x - y = -1
4x + 2y = 22
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Multiply one or both eqns by coefficients to get the same coeff for one of the variables.
In this case, multiply the 2nd eqn by 1/2 to get 1y. Then add them to eliminate y, solve for x, etc.
3x - y = -1
4x + 2y = 22
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3x - y = -1
2x + y = 11
------------ Add them
5x = 10
x = 2
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Sub for x into either eqn to find y.
3x - y = -1
6 - y = -1
y = 7
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