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OpenStudy (brucebaner):
Which ordered pair is the solution to the system of equations? http://static.k12.com/bank_packages/files/media/mathml_0747d7dc6bc9a3c6767aba0b2e86a726ab6901ed_1.gif A. (1, 7) B. (4, 9) C. (7, 19) D. (8, 21) Question Resources
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OpenStudy (danjs):
2x - y = -5 x + 3y = 22 multiply first equation by 3, then add them together ------------- 6x - 3y = -15 x + 3y = 22 ------------ 7x + 0Y = 7 7x = 7 x = 1
OpenStudy (danjs):
Leaves one choice (x,y) where x = 1
OpenStudy (danjs):
(1,7)
OpenStudy (brucebaner):
A
OpenStudy (brucebaner):
thx
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