anonymous
  • anonymous
solve the system by graphing {-2x=2y-4 {2x-y=-5 Help walk through this please.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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freckles
  • freckles
-2x=2y-4 multiplying both sides of this equation by -1 gives 2x=-2y+4 so replace 2x in the second equation with (-2y+4)
freckles
  • freckles
oops solve by grahping
freckles
  • freckles
forgot to read that part

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freckles
  • freckles
write both equations in the form y=mx+b this form is fun to play with because it tells you the slope m and the y-intercept b
anonymous
  • anonymous
-2x=2y-4 2x=-y-5
anonymous
  • anonymous
@freckles ?
freckles
  • freckles
yes you need to write those in y=mx+b form
freckles
  • freckles
for example -2x=2y-4 can be written in that form by doing the following: add 4 to both sides -2x+4=2y 2y=-2x+4 (just wrote the equation the other way around) divide 2 on both sides y=-x+2 so here you see we have a slope of -1 and a y-intercept of 2
freckles
  • freckles
|dw:1443749426871:dw|
freckles
  • freckles
try doing this with the other line you have there
anonymous
  • anonymous
2x=-y-5 so do i add the 5 to 2x?
anonymous
  • anonymous
here is a nice picture http://www.wolframalpha.com/input/?i=-2x%3D2y-4+%2C2x-y%3D-5
anonymous
  • anonymous
oh okay

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