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Activity Discussion Math Solve for x and y Reply To: Solve for x and y

  • Khushi

    Member
    June 22, 2023 at 7:48 pm
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    To solve this, we will use the method of substitution-

    2x + 3y = 9 …(1)

    8x – 2y = 5 …(2)


    Step 1: Solve equation (1) for x in terms of y:

    2x = 9 – 3y

    x = (9 – 3y) / 2

    Step 2: Substitute x in equation (2) with the expression we obtained in step 1:

    8((9 – 3y) / 2) – 2y = 5

    Simplifying further:

    4(9 – 3y) – 2y = 5

    36 – 12y – 2y = 5

    36 – 14y = 5

    -14y = 5 – 36

    -14y = -31

    y = (-31) / (-14)

    y = 31/14

    y ≈ 2.2143

    Step 3: Substitute the value of y back into equation (1) to find x:

    2x + 3(2.2143) = 9

    2x + 6.6429 = 9

    2x = 9 – 6.6429

    2x ≈ 2.3571

    x ≈ 1.1786

    Therefore, the solution to the system of equations is approximately x ≈ 1.1786 and y ≈ 2.2143.

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