SOLUTION: 2x-3y+5z=-5, 2y-3z=4, and 4z=-8

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Question 19320: 2x-3y+5z=-5, 2y-3z=4, and 4z=-8
Answer by akmb1215(68) About Me  (Show Source):
You can put this solution on YOUR website!
To start this problem, solve the third equation for z:
4z+=+-8
z+=+-2

Now, plug -2 in for z in the second equation to get:
2y+-+3%28-2%29+=+4
2y+%2B+6+=+4
2y+=+-2
y+=+-1
Finally, plug -2 in for z AND -1 in for y in the first equation and solve for x:
2x+-+3%28-1%29+%2B+5%28-2%29+=+-5
2x+%2B+3+-+10+=+-5
2x+-+7+=+-5
2x+=+2
x+=+1
Your final answers would be x=1; y=-1; x=-2.