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anonymous

  • 5 years ago

show that each pair is a solution of the equation 2y+x=5;(-1,3) (7,-1)

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  1. anonymous
    • 5 years ago
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    just put values of x & y in your equation and verify that your statement is still true

  2. anonymous
    • 5 years ago
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    i dnt understand were to put them

  3. anonymous
    • 5 years ago
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    In an ordered pair (-1,3) the first number is the x and the second is the y (x,y) so you put -1 in for x and 3 in for y 2(3) + (-1) = 5 6 + (-1) = 5 5 = 5 so that point (-1,3) is on the line 2x + y = 5 now try the next point and I will check you out.

  4. anonymous
    • 5 years ago
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    2(7)+-1=5 did i write that right

  5. anonymous
    • 5 years ago
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    OK.. the point is (7,-1) so x = 7 and y = -1 your equation is 2y + x = 5 make sure you put in x = 7 and y = -1

  6. anonymous
    • 5 years ago
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    so this isnt a coordinate

  7. anonymous
    • 5 years ago
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    2(-1) + 7 = 5 -2 + 7 = 5 5 = 5 so (7,-1) is also on that line... it is a solution.

  8. anonymous
    • 5 years ago
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    yes... it is a coordinate.. but you put the x value of 7 into the y variable and you put the y value of -1 into the x variable. that is the mistake you made.

  9. anonymous
    • 5 years ago
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    i put them in the wrong place

  10. anonymous
    • 5 years ago
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    Yes.

  11. anonymous
    • 5 years ago
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    i got what ur saying so it would always be in the order when i fill in xand y

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