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22 March, 13:01

Y=-2x-6

Y=x+9

Elimination method

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Answers (1)
  1. 22 March, 13:24
    0
    So we have

    y=-2x-6

    y=x+9

    elimination

    multiply second by e

    2y=2x+18

    just add them

    y=-2x-6

    2y=2x+18 +

    3y=0x+12

    3y=12

    divide by 3

    y=4

    subsitue

    4=x+9

    subtract 9

    -5=x

    x=-5

    y=4
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