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rebecca1233
 3 years ago
The following system is solved by substitution. Which expression is substituted for z in the second and third equations?
x + 4y + z = –10
3x – 3y + 6z = –21
x + 2y + 2z = –10
rebecca1233
 3 years ago
The following system is solved by substitution. Which expression is substituted for z in the second and third equations? x + 4y + z = –10 3x – 3y + 6z = –21 x + 2y + 2z = –10

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rebecca1233
 3 years ago
Best ResponseYou've already chosen the best response.0x + 4y – 10 –x + 4y – 10 –x – 4y – 10 x – 4y – 10

mark_o.
 3 years ago
Best ResponseYou've already chosen the best response.0hi did you see the first equation? solve it for z ? what did you get?
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