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OpenStudy (anonymous):
The following system is solved by substitution. Which expression is substituted for z in the second and third equations? x + 5y – z = 6 3x – y – 2z = 4 3x – 2y + 3z = 13
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OpenStudy (anonymous):
Solve the first equation for z.
OpenStudy (anonymous):
I know that, I'm just no good, at actually DOING it..:(
OpenStudy (anonymous):
Well, subtract the x and 5y from both sides and what do you have?
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