Question 359622: For problems 7 through 9, solve the system of equations using ADDITION to eliminate one variable. If the system has no solution, indicate that is is inconsistent. If it has infinite solutions, indicate that it is dependent. If the system has a solution, CHECK YOUR ANSWER.
9.
3x-2y=14
3x+5y= -14
CHECK (if possible)
Pleeeaase help me!! I am so stuck I don't know what to do!! Thank you! :)
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! 3x-2y=14
3x+5y= -14
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Since the x coefficients are the same, subtract.
Subtraction is acceptable when using the addition method. You can multiply either eqn by -1 first, then add.
3x-2y=14
3x+5y= -14
--------- Subtract
-7y = 28
y = -4
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Sub for y in either eqn
3x -2(-4) = 14
3x + 8 = 14
3x = 6
x = 2
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