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6 July, 11:28

What is the solution to the system of equations? Use the linear combination method.

{2x-3y=9

{3x+5y=4

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  1. 6 July, 11:39
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    1. {2x-3y=9

    {3x+5y=4

    2. { (2x-3y=9) * 5

    { (3x+5y=4) x3

    3. {10x-15y=45

    {9x+15y=12

    4. (10x-15y=45) + (9x+15y=12) = (19x=57)

    5. (19x=57) : 19

    6. x=3

    7. 2 (3) - 3y=9

    8. 6-3y=9

    9. - 3y=9-6

    10. (-3y=3) : (-3)

    11. y=-1

    Answer: x=3 and y=-1
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