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18 August, 22:05

Thomas was selling tickets to his school play. The tickets cost $5.00 for adults and $2.00 for children. He sold 200 tickets and collected $610. Which system represents the number of adult and child tickets that Thomas sold?

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  1. 18 August, 22:24
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    Adult: $5, qty x

    children: $2, qty y

    total: $610, qty 200

    Cost: 5x + 2y = 610

    Quantity: x + y = 200

    Using elimination method to solve the system of equations:

    1 (5x + 2y = 610) → 5x + 2y = 610

    -2 (x + y = 200) → - 2x - 2y = - 400

    Add both equations: 3x + 0 = 210

    Divide both sides by 3: x = 70

    Substitute "x = 70" into either the Cost or Quantity equation:

    Quantity: x + y = 200 → 70 + y = 200 → y = 130

    Adult tickets sold = 70

    Children tickets sold = 130
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