anonymous
  • anonymous
Use a graph and a table to solve the system {3y+6x=3 x-y=7 and i'm suppose to have the two points where they intercept but i don't know how to do it.
Mathematics
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anonymous
  • anonymous
Use a graph and a table to solve the system {3y+6x=3 x-y=7 and i'm suppose to have the two points where they intercept but i don't know how to do it.
Mathematics
katieb
  • katieb
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Mertsj
  • Mertsj
Divide the first equation by 3
Mertsj
  • Mertsj
You will get 2x+y=1 Then add the two equations. That will eliminate y and you can solve for x. can you do that?
anonymous
  • anonymous
im still a little confused..

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anonymous
  • anonymous
no. it says graph and table!
anonymous
  • anonymous
Graph/Plot 3y + 6x = 3 Take 3y + 6x = 3 and turn it into slope intercept form 3y = -6x +3 3y/3 = -6x/3 +3/3 y = -2x + 1 in this equation we have our first point y = -2x + 1, which is the y intercept 1. plot (0,1) Now we have our first point (0,1) lets use our slope to find the next point. Our slope is -2x, so from (0,1) move down 2, since we are working with negatives, form the point (0,1), which will give us (1,-1).Now plot the two points (0,1) and (1,-1) and draw a line. do the same for the other equation and where the two lines cross is your answer. This is if you have to graph your work and show it
anonymous
  • anonymous
graph the 2 equations. the first one is 3y+6x=3 --> y+2x =1 --> y=1-2x the second one is x-y=7 --> x = 7+y --> y = x-7
anonymous
  • anonymous
good job doodletech
Mertsj
  • Mertsj
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anonymous
  • anonymous
thank you guys <3

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