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Please show me how to calculate this problem: The school cafeteria sells two kinds of wraps: vegetarian and chicken. The vegetarian wrap costs $1.00 and the chicken wrap costs $3.20. Today they made $99.20 from the 42 wraps sold. How many of the wraps sold were vegetarian?

  • math -

    total sales:
    total wraps:

    1.00v + 3.20c = 99.20
    v + c = 42

    subtract one equation from the other:

    2.20c = 57.20
    c = 26
    so, v = 16

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