Work Step by Step
Add the first equation to the second: $4x=-8\\x=-2$ Multiply the third equation by $2$ and add it to the second equation: $7x+7z=14$ Find $z$: $7(-2)+7z=14\\z=4$ Find $y$: $3(-2)-2y+4=-18\\y=8$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.