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OpenStudy (anonymous):
Add to eliminate. x + 2y = 21 3x - 2y = 7
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OpenStudy (anonymous):
4x = 28 x = 7 y = 7
OpenStudy (anonymous):
Thank you! Can you show the steps?
OpenStudy (anonymous):
add the two equations you get 4x = 28 x = 7 subsitute 7 for x back to the equation 7 + 2y = 21 2y = 14 y = 7
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