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How do i solve systems of equations by adding or subtracting? - Answers
You multiply one equation by some constant, or both equations by different constants, and then add one equation to another (or subtract). Here is an example: 2x + 4y = 30 x + y = 10 Multiplying the second equation by (-2), you get: 2x + 4y = 30 -2x -2y = -20 Now you can add the two equations together, resulting in: 2y = 10 You can solve this for "y"; then you can replace the value you found in any of the original equations to find the corresponding value for "x".
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How do i solve systems of equations by adding or subtracting? - Answers
You multiply one equation by some constant, or both equations by different constants, and then add one equation to another (or subtract). Here is an example: 2x + 4y = 30 x + y = 10 Multiplying the second equation by (-2), you get: 2x + 4y = 30 -2x -2y = -20 Now you can add the two equations together, resulting in: 2y = 10 You can solve this for "y"; then you can replace the value you found in any of the original equations to find the corresponding value for "x".
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How do i solve systems of equations by adding or subtracting? - Answers
You multiply one equation by some constant, or both equations by different constants, and then add one equation to another (or subtract). Here is an example: 2x + 4y = 30 x + y = 10 Multiplying the second equation by (-2), you get: 2x + 4y = 30 -2x -2y = -20 Now you can add the two equations together, resulting in: 2y = 10 You can solve this for "y"; then you can replace the value you found in any of the original equations to find the corresponding value for "x".
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