anonymous
  • anonymous
Solve the system of equations? 4x-y=8 and -8x+2y=-5 I think its no solution
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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UsukiDoll
  • UsukiDoll
solving a system of equations and "all real numbers" are unrelated. However, you can solve these problems by graphing, elimination, substitution, or using matrices.
UsukiDoll
  • UsukiDoll
I have to go for a bit... I"ll leave it up to the rest of the helpers on here.
anonymous
  • anonymous
I tried using substitution and I got 0x=11 so...

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UsukiDoll
  • UsukiDoll
we can use elimination method 4x-y=8 (first) -8x+2y=-5 (second) so let's multiply the entire first equation by 2 2(4x-y=8)
anonymous
  • anonymous
8x-2y=16?
UsukiDoll
  • UsukiDoll
mhm 8x-2y=16 -8x+2y=-5 now what happens if we add?
UsukiDoll
  • UsukiDoll
what happens if we add these two equations together?
anonymous
  • anonymous
The x's and y's get canceled out
UsukiDoll
  • UsukiDoll
yes and we're left with 0 = 11 is that a true statement or a false statement?
anonymous
  • anonymous
false
UsukiDoll
  • UsukiDoll
yup because 0 is NEVER EQUAL to 11 when the x and y values cancel out, we have an inconsistent system. An inconsistent system means that there is no solution There is no x and no y value that will satisfy these equations. So we're done. :)
anonymous
  • anonymous
Thank you

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