anonymous
  • anonymous
Solve: 2x + 3y + z = -3 x + 4y - 3z = -23 3x - y +2z = 14 I don't even know how to start this problem:(
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
have u learnt Cramer's rule?
anonymous
  • anonymous
or the matrix method?
anonymous
  • anonymous
No I have not. At least I don't believe so. I know I need to reduce the problem down to like 2 equations

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
then which method would u adopt for the solution?
anonymous
  • anonymous
we can reduce the equations into two variables n two equtations
anonymous
  • anonymous
would I need to set the equations equal to zero and factor?
anonymous
  • anonymous
no u have to eliminate one variable, then solving them simultaneously
anonymous
  • anonymous
like, we can choose eq 1 and 2 n eliminate x,say
anonymous
  • anonymous
likewise we can select eq 2 n three, again eliminate x
anonymous
  • anonymous
we get a et of two eqs in 2 variables
anonymous
  • anonymous
got it?or u need the solution?
anonymous
  • anonymous
Can you show me the steps? That would help me a lot.
anonymous
  • anonymous
I am studying for my final and this is a practice problem I am doing, I just can't figure it out.
anonymous
  • anonymous
multiply eq 2 with 2 and subtract eq 1 and 2 2x+3y+z=-3 2x-2y+4z=28 ---------------------- 5y-3z=-31(on subtraction)
anonymous
  • anonymous
right?
anonymous
  • anonymous
similarly multiplying eq 2 by 3 and subtracting 2 and 3
anonymous
  • anonymous
3x+12y-9z=-69 3x-y+2z=14 --------------- -13y-11z=-83
anonymous
  • anonymous
is it ok?
anonymous
  • anonymous
yes, Thank you.
anonymous
  • anonymous
now there r two equations in two variables u can use either substitution method or elimination method
anonymous
  • anonymous
2x+3y+z=-3 2x+8y-6z=-46 --------------- -5y+7z=-43
anonymous
  • anonymous
i missed the multiplication by 2 first :(
anonymous
  • anonymous
I don't know, its just still very confusing to me. So can you go back to the beginning..... I have 2x + 3y + z = -3 but where did the equation blow it come from?

Looking for something else?

Not the answer you are looking for? Search for more explanations.