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Today, 17:12

Jerry started doing sit-ups every day. The first day he did 15 sit-ups. Every day after that he did 2 more sit-ups than he had done the previous day. Today Jerry did 28 sit-ups. Write an equation that could be solved to find the number of days Jerry has been doing sit-ups since the first day.

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  1. Today, 18:25
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    Y=2x+15

    where y=number of sit ups

    x=number of days
  2. Today, 20:10
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    Y = sit ups, x = days

    y = 2x + 15

    33 = 2x + 15 (subtract 15 from both sides)

    18 = 2x (divide both sides by 2)

    9 = x, 9 days
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