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23 January, 06:19

Solve the system is equations and choose the correct answer from the list of options.

d+e=15

-d+e=-5

Label the ordered pairs as (d, e).

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  1. 23 January, 06:46
    0
    D+e=15

    -d+e=-5

    The ds cancel out so

    e=15

    e=-5

    Add both sides of equations together

    2e=10

    Divide by 2

    e=5

    Substitute 5 for e in either equation:

    d+5=15

    Subtract 5

    d=10

    (10,5)
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