Karinasigala Karinasigala

14-08-2018
Mathematics

contestada

Kara has 21 collectible buttons to sell. She sells the small buttons for $3 and the large buttons for $4, and earns a total of $68. If the small buttons are represented by x and the large buttons are represented by y which of the following systems of equations can be used to calculate the number of large and small buttons sold.

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meredith48034 meredith48034

14-08-2018

x+y=21
3x+4y= 68

-3x-3y=-63
3x+4y= 68

y= 5 large buttons

x + 5= 21

x= 16 small buttons

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