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OpenStudy (anonymous):
Which of the following ordered pairs is a solution to the system of linear equations below? (Solutions: 4x + y = 19, 3x - y = 9) 1 and three sevenths, ten and three sevenths, (10,-21), (2,11),(4,3)
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OpenStudy (amistre64):
when given options; just plug them in to see what works
OpenStudy (amistre64):
add the 2 equations together and you dont have to trial and error as much
OpenStudy (amistre64):
4x + y = 19 3x - y = 9 ----------- 7x + 0 = 28
OpenStudy (amistre64):
hmm, id go with the last option in this case :)
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