SOLUTION: I have no clue how to do this. Can you please work it out for me. x+2y-3z=2 3y- z=13 3y+5z=25 Thank you so much. Janet

Question 235545: I have no clue how to do this. Can you please work it out for me.
x+2y-3z=2
3y- z=13
3y+5z=25
Thank you so much.
Janet
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
x + 2y - 3z = 2
3y - z = 13
3y + 5z =25
:
Start by subtracting the 2nd equation from the 3rd equation
3y + 5z = 25
3y - z = 13
--------------subtraction eliminates y, find z
6z = 12
z =
z = 2
;
Find y using the 2rd equation, substitute 2 for z
3y - 2 = 13
3y = 13 + 2
3y = 15
y = 5
;
find x using the 1st equation, substituting for y and z
x + 2(5) - 3(2) = 2
x + 10 - 6 = 2
x + 4 = 2
x = 2 - 4
x = -2

RELATED QUESTIONS
x=2y=4 the directions are rewrite each linear equation in slope intercept for. Name the... (answered by 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)

I am supposed to solve a linear equation using the method of elimination, I have retried... (answered by Fombitz,acalgebra,CharlesG2)

ok so this is my equation. and i get it and all its just i cant get it to work but the... (answered by scott8148)

1.5x+y7=-3 2x+3y=-1 2.2x+3y=7 8x+12y=2 3.2x-y+3z=9 x+2z=3 3x+2y+z=10 I am... (answered by stanbon)

z=sqrt(x^2+y^2) I have no idea of how to solve this. Could someone please explain to me... (answered by solver91311)

Can you please help me solve this equation: {{{-3(x+y)+7(2x+1)}}} I tried to work it... (answered by drj)

I have tried to work this system can you please tell me if it is corect. 4x-12y= 5... (answered by stanbon)

I have no idea how to do these, but its solving linear systems. 1) 35x+y=20... (answered by lwsshak3,smmoore,MathTherapy)