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11 September, 10:30

What is (2n + 20) + 60 = 90?

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  1. 11 September, 13:39
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    2n+20+60=90 2n+80 = 90 2n+80 = 90 80 - 80 2n = 10 2 2 n = 5
  2. 11 September, 14:09
    0
    (2n + 20) + 60 = 90

    -60 - 60

    2n+20 = 30

    -20 - 20

    2n=10

    divide by two on both sides

    n=5
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