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17 August, 14:08

5r^2-44r+120=-30+11r

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  1. 17 August, 14:22
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    5r^2-44r+120=-30+11

    5r^2=25r

    25r-44r+120=-30+11

    -19r+120=-19

    -19r=-19-120

    -19r=-139 the divide both sides by - 19

    r=-7.3
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