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15 December, 14:45

Isabel's brother wants to buy a graphing calculator for $100. He already has $30 and saves $5 per week from his allowance. Write an equation and solve in order to determine how many weeks, W, take Isabel brother to save enough money for the calculator

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  1. 15 December, 15:14
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    You know that 7 days is in a week. So 5x7=35 add 30 and 35 to get 65. You now need 35 more 5x7 = 36. So about 14 weeks
  2. 15 December, 18:10
    0
    X represents the weeks.

    5x+50=100
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