SOLUTION: Need help in solving this equation by addition 2y + z = 4 x -3y + 2z =9 -y =3

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Question 298760: Need help in solving this equation by addition
2y + z = 4
x -3y + 2z =9
-y =3
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
2y + z = 4
x -3y + 2z =9
-y =3
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y = -3
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2y + z = 4
-6 + z = 4 Add 6 to both sides, that's addition
z = 10
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x +9 + 20 = 9
x = -20
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