Question

If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable z is eliminated in the second and third equations, then the first and second equations.

5x + 2y + z = -23x + 4y + 3z = 2-4x - 3y - 3z = 1
Answer

5x + 2y = -23x + 4y = 2

-x + y = 3-12x - 2y = 8

5x + 2y = -2-12x - 2y = 8

x - y = -33x + 4y = 2

Answer 1

The answer I have is B........

Answer 2

those are the equations ?
5x + 2y + z = -2
3x + 4y + 3z = 2
-4x - 3y - 3z = 1

Answer 3

Yes

Answer 4

in order to eliminate z from the second
we multiply the first by 3 and then subtract the first from the second :
3x + 4y + 3z = 2
minus
15x +6y+3z= -6

=
-12x -2y = 8

Answer 5

It's either B, or c

Answer 6

:)))

Answer 7

oh wait they want the first and second ? why i saw third :O

Answer 8

:( I find no encouragements in any of this.

Answer 9

ok so second from third
we just add the equations
3x + 4y + 3z = 2
+
-4x - 3y - 3z = 1
and get
-x +y = 3

Answer 10

so bravo ! it is B:)

Answer 11

Oh my gosh ;')

Answer 12

I won!!!!!!!!!!!!!!!!!!!!! I understand!!!!!!!!!!!!!!!!!! :))))))))))Thank you!!!!!!!!!!!

Answer 13

yw:)