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18 February, 22:46

Solve the equation: 5r - 4 (-5r - 7) = - 72

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  1. 18 February, 23:15
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    5t - 4 (-5r - 7) = - 72

    5r + 20r + 28 = - 72

    25r + 28 = - 72 |subtract 28 from both sides

    25r = - 100 |divide both sides by 25

    r = - 4
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