Mathematics

Question

y= 3x - 10
y= 2x - 5

2 Answer

  • use subtraction method....
    Y -3X = -10
    (-Y -2x = -5)  -Y + 2X = 5

    so...

    Y -3X = -10
    -Y + 2X = 5
           -X = -5
    X = 5  Now fill in the 5 for X and Y = 5

  • If you're looking for a solution for both equations and had a choice between the 3 ways of solving it, I would choose substitution for this problem. So..

    2x-5=3x-10

    Move like terms to their own sides.

    Take 2x away from both sides, and add 10 to both sides. That should leave you with

    5=x

    Now that you have the x, plug it into the equation that works best for you to solve.

    That should be y=2(5)-5

    y=10-5

    y=5

    (5,5) is your solution.