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22 February, 17:22

Solve the system using elimination

2x+3y=9

x+5y=8

A. (0,3)

B. (-2,2)

C. (-1/2,10/3)

D. (3,1)

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Answers (1)
  1. 22 February, 19:22
    0
    Eliminate x's

    multiply 2nd equation by - 2 ad add to first

    2x+3y=9

    -2x-10y=-16 +

    0x-7y=-7

    -7y=-7

    divide by - 7

    y=1

    sub back

    2x+3y=9

    2x+3 (1) = 9

    2x+3=9

    minus 3

    2x=6

    divide 2

    x=3

    x=3

    y=1

    (x, y)

    (3,1)

    D
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