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anonymous
 3 years ago
How do you solve? 3x + 3y + 2z = –5
x + y + 3z = –4
2x + 2y + 5z = –7
anonymous
 3 years ago
How do you solve? 3x + 3y + 2z = –5 x + y + 3z = –4 2x + 2y + 5z = –7

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0can you set up the augmented matrix?

UnkleRhaukus
 3 years ago
Best ResponseYou've already chosen the best response.0add the second and third equations, and find the difference with the first equation, hence solve for z

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0or you can do matrices.

Callisto
 3 years ago
Best ResponseYou've already chosen the best response.23x + 3y + 2z = –5 (1) x + y + 3z = –4 (2) 2x + 2y + 5z = –7 (3) (2)x(2) + (2) 2 (x + y + 3z) + (2x + 2y + 5z) = 2(4) + (7) z = 1 z= 1 Sub z=1 into the equations. Solve x and y. If I haven't got that wrong, there should be infinitely many solutions for x and y. Sorry, I made a mistake in the deleted post.
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