Algebra

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4x - y = 7 I need ordered pairs for this linear equation, I was wondering of some possible solutions. Thanks!

  • Algebra -

    Uhh im not sure if this is right but i think you should first put it in slope intercept form.

    then make an X and Y chart to find solutions.

    y=4x-7

    (0,-7)
    (1, -3)
    (2, 1)

  • Algebra -

    Would (2,1) (3,5) and (4,9) work as well? Thanks!

  • Algebra -

    yea i got (2,1) in my first post. Yeah, they should all work.

  • Algebra -

    Even though you switched it to the y = 4x - 7? Is this all the same or is the -7 and 7 the constants changed? Thanks

  • Algebra -

    no, when i put in slope intercept form i got -7

    the original equation was
    4x-y=7
    subtract 4x to both sides
    -y=-4x+7
    you cant have a -y so move the negative over, this will change the sign of everything

    y=4x-7

  • Algebra -

    if you had 4x+y=7
    then the slope intercept form of that would be

    y=-4x+7

  • Algebra -

    So which is the correct method? Switching the original, or just using variables as i did to make the equation true

    4x-y = 7

    4(2) - 1 = 7 (2,1)

    4(3) - 5 = 7 (3,5)

    4(4) - 9 = 7 (4,9)

    Which method is correct? Or does it not matter because the equation has infinate solutions? Thanks!

  • Algebra -

    Both method is fine.

  • Algebra -

    Are you a math teacher? Just wondering?

  • Algebra -

    no im not. but im in alg 2

  • Algebra -

    That makes sense..High School?

  • Algebra -

    yeah high school.

  • Algebra -

    Ok! Have a good night and thanks for the help!

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