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OpenStudy (anonymous):
Solve the following system of equations by substitution. 3y = 9 and 9y + 2x = -12
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OpenStudy (anonymous):
3y = 9 Therefore y = 3 Substituting y = 3 in 9y + 2x = -12, we get (9*3) + 2x = -12 27 + 2x = -12 2x = -12-27 x = -39/2
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