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OpenStudy (anonymous):
Identify the first step using the elimination method to solve the following system of equations: 10x - 7y = -18 15x + 3y = 27 A. 7(10x - 7y = -18) 3(15x + 3y = 27) B. 15(10x - 7y = -18) 10(15x + 3y = 27) C. -3(10x - 7y = -18) 2(15x + 3y = 27) D. 27(10x - 7y = -18) 18(15x + 3y = 27)
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OpenStudy (texaschic101):
That would be C. If you multiply the top equation by -3 and the bottom equation by 2, then the x's will cancel out.
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