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OpenStudy (anonymous):
What is a possible first step in eliminating a variable in the following system of equations? x + 7y = -15 2x + 7y = -9
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OpenStudy (anonymous):
a. Multiply the first equation by -1. b. Multiply the second equation by -1 c. Multiply the first equation by -2. d. All of the above
OpenStudy (anonymous):
d
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