Do my math for me! D:< (Um, I mean, please help me?)

Bla di bla

Posted by Jackie Dawson almost 3 years ago

The three Math Idol judges have been eliminating contestants all day! The number of one-step equations and two-step equations who have been eliminated today is equal to 1150. If three times the number of one-step equations minus twice the number of two-step equations is equal to 1300, how many one-step equations auditioned today?

a. 1300
b. 1120
c. 708
d. 412

...... wut

  1. Avatar_1417125027763

    almost 3 years ago Courfeyrac replied:

    Define your variables first. It always helps.

  2. Bla di bla

    almost 3 years ago Jackie Dawson replied:

    So.... x = 1150.

    3y - 2x = 1300?

    Is that right?

  3. Photo (1)

    almost 3 years ago Brady Banana-Neck replied:

    Sounds about right.

    I hate math.

  4. Bla di bla

    almost 3 years ago Jackie Dawson replied:

    But what do I do after that!?

  5. Eye2

    almost 3 years ago Ajax (Jordan) replied:

    3y - 2(1150) = 1300

    Can you solve it from there?

  6. Bla di bla

    almost 3 years ago Jackie Dawson replied:

    I managed to get to 3y = 1300 + 2x, because you're supposed to isolate the y value, correct? So what now? I'm supposed to divide both sides by 3, right? But I can't do that... can I?

    :|

  7. Eye2

    almost 3 years ago Ajax (Jordan) replied:

    Well, if x = 1150 then 2x = 2300.

    so 3y = 1300 + 2300.

    3y = 3600

    y = 1200

    Just to check

    3600 - 2300 = 1300.

  8. Bla di bla

    almost 3 years ago Jackie Dawson replied:

    ... And so, 1300 is the answer?

  9. Eye2

    almost 3 years ago Ajax (Jordan) replied:

    no. Because you messed up saying x = 1150. x + y = 1150.

  10. Bla di bla

    almost 3 years ago Jackie Dawson replied:

    I don't understand why that is correct-- in words, what would that mean?

  11. Eye2

    almost 3 years ago Ajax (Jordan) replied:

    x = 1150 - y

    3y - 2(1150 + y) = 1300

    3y - 2300 + 2y = 1300

    5y = 3600

    y = 720

    Now find x.

You must sign in or sign up to reply to this topic! What are you waiting for?