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March 25, 2017

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A store sold 29 sweatshirts. White ones cost $ 9.95 and yellow ones cost $ 11.50
If $ 305.05 worth of sweatshirts were sold, how many of each were sold.
Let x=the number of white sweatshirts
Let y= the number of yellow sweat shirts
Complete the system of equations.
x+y=

$ x+ $ y= 304.o5

  • algebra - ,

    9.95x+11.5y=305.05
    x+y=29

    9.95x+9.95y=29*9.95
    Or (11.50-9.95)y=305.05-288.55
    1.55y=16.5
    y=16.5/1.55=10.6, say 11 yellow shirts
    29-11=18 white shirts

    11*11.5+18*9.95=305.6 OK.

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