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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 A) x + 5y + 6 B) x + 5y - 6 C) -x - 5y + 6 D) -x - 5y - 6
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OpenStudy (anonymous):
x+5y-6=z take it from eq 1...
OpenStudy (anonymous):
same as before.. i see now thanks!
OpenStudy (anonymous):
welcome..
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