Pre algebra question using linear equation ax+b=c to solve

label Algebra
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schedule 1 Day
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Kala received a 
 gift card for a coffee store. She used it in buying some coffee that cost 
 per pound. After buying the coffee, she had 
 left on her card. How many pounds of coffee did she buy?
Jul 31st, 2015

Thank you for the opportunity to help you with your question!

Let one pound of coffee be = x

the linear equation will be;

7.53x +47.41=70

7.53x=70-47.41=22.59

7.53x=22.59


therefore  x=22.59/7.53=3

=3 pounds of coffee

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Please let me know if you need any clarification. I'm always happy to answer your questions.
Jul 31st, 2015

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Jul 31st, 2015
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