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4 September, 13:33

Jerry started doing sit-ups every day. The first day he did 15 sit-ups. Every day after that he did two more sit-ups than he had done the previous day. Today Jerry did 33 sit-ups. Write an equation that could be solved to find the number of days Jerry has been doing sit-ups, not counting the first day.

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  1. 4 September, 15:44
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    33 = 15 + 2 (d)

    Step-by-step explanation:

    d = days since we are not including the starting day

    sit ups = starting + 2 * days

    33 = 15 + 2 (d)
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