Math

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John says to Brenda, "if you give me eight dollars, we will have an equal amount of money." Brenda responds, "but if you give me eight dollars, I will have twice as much money as you." How much money did Brenda and John each have?
Need to show how you did this.

  • Math -

    J+8=B-8
    B+8=2(J-8)

  • Math -

    I got this far and still am stuck. How much do they each have?

  • Math -

    Solve this system of equations by substitution or elimination.

    Substitution would probably be easiest. Simply solve for b in the first equation and substitute that into the second equation.

  • Math -

    I have tried substituting J and B with several different numbers and I can't come up with answer. I have been working on this so long and don't get it. How much money do they each have/

  • Math -

    This on is pretty easy, you just have to create 2 equations base on the problem.
    X = Jonh
    Y = Brenda

    X+8 =Y
    Y+8 =X

    X=Y-8

    Y+8=2(Y-8)
    Y+8=2Y-16
    Y-2Y=-16-8
    -Y=-24
    Y=-24/-1
    Y=24

    X=Y-8
    X=24-8
    X=16

    I also post the answer to your other problem... hope that help you at least a little.

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