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12 September, 04:12

X+Y=100

4.5X+20Y=822

Elimination, graphing, and substitution methods.

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  1. 12 September, 04:27
    0
    y=10

    4 SX + 20 Y = 822

    Elimination

    X - 10 - 4

    UX - 822-20Y

    6.5

    10 - 4 = 822-201

    45

    - 4.5 = 822 - 204

    15.54=774

    4 = 90:13

    = - 40.129
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