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Mathematics 20 Online
OpenStudy (anonymous):

Help with Algebra 2? Solve the system using substitution or elimination. The answers are given as (x,y,z).

OpenStudy (anonymous):

OpenStudy (anonymous):

add the second and third equations to get rid of z, and subtract the first and third ones to again get rid of z.

OpenStudy (anonymous):

Answer Choices: (1,-3,0) (-3, 3, 0) (-31/5, 11, -3) (1, -3, 12)

OpenStudy (anonymous):

By now you have two equations that you should be able to solve easily by whichever method you want

OpenStudy (anonymous):

-x-2y=5 x+y=-2

OpenStudy (anonymous):

solve for x and y, then plug back into one of the original 3 equations to find z

OpenStudy (anonymous):

@M0j0jojo

OpenStudy (anonymous):

@bloofoffiction

OpenStudy (anonymous):

so it would be (1,-3,0)? @ertdre

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