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blondebaby42911

  • 2 years ago

How do i graph: x – 3y = –12 2x – y = 1

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  1. blondebaby42911
    • 2 years ago
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    sorry. its x-3y= 12 2x-y=1

  2. satellite73
    • 2 years ago
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    you looking to graph both and find where they intersect?

  3. satellite73
    • 2 years ago
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    will look like this http://www.wolframalpha.com/input/?i=x+%E2%80%93+3y+%3D+12+and+2x+%E2%80%93+y+%3D+1

  4. EarthCitizen
    • 2 years ago
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    \[y = (x+12)/3,y = 2 x-1\]

  5. satellite73
    • 2 years ago
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    if you are going to do it by hand, probably the best think to do if fine the intercepts

  6. satellite73
    • 2 years ago
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    so for \[x-3y=12\] find the x intercept by setting y = 0 get \[x=12\] so you know (12,0) is on the graph. for the y - intercept set x = 0 and get \[-3y=12\implies y=-4\] so you know (0,-4) is on the graph. plot those two points, connect the dots

  7. satellite73
    • 2 years ago
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    repeat the process for \[2x-y=1\] or else rewrite as earthcitizen wrote as \[y=2x-1\] and then replace x by some well chosen numbers and find a couple points

  8. meverett04
    • 2 years ago
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    did this help?

  9. blondebaby42911
    • 2 years ago
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    yes it di. thankS!

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