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OpenStudy (anonymous):
When using the substitution method, what expression for x in the second equation would be substituted in the first equation? 4x – 7y = –9 x + 3y = 12 –3y + 12 3y – 12 –3y – 12 3y + 12
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OpenStudy (anonymous):
x+3y=12 x=12-3y = -3y+12 1st one
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