Post a New Question

algebra 1

posted by .

Solve each linear system by substitution method.

x+2y=7
2x+4y=8

I'm getting stuck. Could some one explain the work out process and what the outcome means?

  • algebra 1 -

    change the first to x = 7 - 2y
    sub that into the second

    2x + 4y = 8
    2(7-2y) + 4y = 8
    14 - 4y + 4y = 8
    14 = 8 ???? Wow

    When this happens there is no solution

    Looking at your equations more closely, ..
    divide the second by 2 to get
    x + 2y = 8 and the first said
    x + 2y = 7 ... contradiction !

    What you are looking at is really two straight lines that are parallel, they cannot intersect.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question