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2 September, 19:23

Use the linear combination method to solve the system of equations. Explain each step of your solution.

-4x + 9y = 9

x - 3y = - 6

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  1. 2 September, 21:55
    0
    x=9 y=5

    Step-by-step explanation:

    Let - 4x+9y=9 be function 1 while x-3y=-6 be function 2

    function 1 plus 4 times function 2

    -4x+4x+9y-12y=-15

    Simplify

    -3y=-15

    Divide each side by - 3

    y=5

    Substitude y=5 into function 2

    x-3 (5) = -6

    x-15=-6

    add 15 to each side

    x=9
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