Post a New Question

Algebra :\

posted by .

these questions are:
ELIMINATION USING MULTIPLICATION:
1. 2.
2x + 5y = 3 2x + y = 3
-x + 3y =-7 5x + 3y = 2


I NEED HELP ASAP!!!!
HELP PLEASE!!!!

  • Algebra :\ -

    If I were you, I would mutiply the bottom left clear through by 2 to get rid of the x's and leave the y's:

    2x+5y=3
    -2x+6y=-14

    2+-2 opposites add up to zero

    11y=-11

    y=-1

    Do the same with the others on the right. -3 as a factor makes the y's go away so you have nothing but x's to do.

    -6x+-3y=-9 and 5x+3y=2 Opposite 3's add up to zero.

    -x=-7 which is the same as x=7

  • Algebra :\ -

    Introduce a factor that gives you only one variable letter to work with instead of two. Take -x times 2 to get -2x which adds up to zero when added to 2x. Boom, your x's are gone. Solve for y and use whatever y equals to find x back in the original equations. -3y+3y=0 for the other side, so you can knock out the y's. Figure out x. Go back and figure out y based upon x.

  • Algebra :\ -

    thnx i got the answers to that one but now im stuck on elimination using addition and subtraction.

Answer This Question

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question