SOLUTION: x+5y-z=16 3x-3y+2z=12 2x+4y+z=20 Please help me solve this. I have tried and keep getting a decimil point that doesn't fit in.

Question 160050: x+5y-z=16
3x-3y+2z=12
2x+4y+z=20
Please help me solve this. I have tried and keep getting a decimil point that doesn't fit in.
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
add 1st eqn and 3rd eqn __ 3x+9y=36 __ x+3y=12 __ x=12-3y

multiply 1st eqn by 2, then add 2nd eqn __ 5x+7y=44

substituting __ 5(12-3y)+7y=44 __ 60-8y=44 __ y=2

substituting __ x=12-3(2) __ x=6

substituting __ (6)+5(2)-z=16 __ z=0
RELATED QUESTIONS
how do i solve this system that has three variables? x+5y-z=16 3x-3y+2z=12... (answered by jim_thompson5910)

Please help me solve the following for x, y, and z. and please show the work.... (answered by josgarithmetic,mananth,MathTherapy)

x5y-z=16 3x-3y+2z=12 2x+4y+z=20 i need to solve using the linear combination.... (answered by stanbon)

Could you please solve this for me using cramer's rule...I have tried 3 times and I keep... (answered by psbhowmick)

Please help me solve this. I have tried several times but I am missing something or doing (answered by Gogonati,mananth)

Please help... I tried to solve this, but no result. I eliminated z in 1&2,and 2&3, but... (answered by htmentor,ikleyn)

Please help me with this, I tried to solve it, but cannot get the solution Solve the... (answered by Edwin McCravy,AnlytcPhil)

Please help me solve this linear system with three variables. 2x-y+2z=-21 x+5y-z=25 (answered by Alan3354)

Can you please help me solve this? I keep getting 3x as the answer, but the book tells... (answered by jim_thompson5910)