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OpenStudy (anonymous):
What is the value of Dy in the following system? x + 3y = –3 2x + 5y = –7
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OpenStudy (amistre64):
OpenStudy (amistre64):
it a pattern that can be remembered; in this case: -7(1)-2(-3) ----------- = Dy 5(1) - 2(3)
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