Can someone help with this one math homework question please? 10 points?
Topic: Solving systems of equations in three variables homework
May 19, 2019 / By Dindrane Question:
I got part of it but I need help with the rest.
Solve this system in three variables:
x + 4y - z = 20
3x + 2y + z = 8
2x - 3y + 2x = -16
I got "y", which was 4, but I need help finding x and z... Can someone help,and explain the process to me as well, because I'm a little stuck. I just need to find the two other variables, x and z.
Thank you so so so much.
Best Answers: Can someone help with this one math homework question please? 10 points?
Caris | 3 days ago
if u found y and ur answer is correct
u can plug y=4 into the first and second equations
so the 2 equations are
add these two equations
plug this into x-z=4
x=1 and z=-3 and y=4
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We found more questions related to the topic: Solving systems of equations in three variables homework
put the y=4 in any two equations , from first two,you will get
3x+z=0 adding both, get
x=1 and put this valve in one of the above equation.
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in case you opt for to element it right into a appropriate sq., it (would be of the variety (ax+b)^2, because is a quadratic. look on the co-useful of x^2. considering that (ax+b)^2=(a^2)(x^2)+2abx+b^2=25x^2+20x+o... by using equating the co-efficients of x^2 on the two components we detect that a^2=25, so a=5. Now, equate the co-efficients of the x words. we detect that 2ab=20, and plugging in a=5 we get 10b=20, b=2. Now, equating the consistent words, we get that ok=b^2, and substituting b=2 we get that ok=2^2=4, this is the respond. wish this helps!
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