Question

= O EQUATIONS AND INEQUALITIES Solving a decimal word problem using a linear equation of the... Jayden Esp Leila received a $90 gift card for a coffee store. She used it in buying some coffee that cost $7.26 per pound. After buying the coffee, she had $60.96 left on her card. How many pounds of coffee did she buy?​

Answer 1

Jayden buys 4 pounds of coffee

Explanation:

Let's say that p represents the number of pounds of coffee Jayden bought. She starts with $90, and for each pound she buys, she loses $7.26 dollars. Therefore, as she loses 7.26 dollars, we must subtract the amount she pays from $90. Then, as she loses 7.26 dollars for each pound, we multiply 7.26 by the number of pounds to find the money she spends.

We can thus write our equation as

90 - 7.26*p = final amount = 60.96

90-7.26p = 60.96

subtract 90 from both sides to isolate the p and its coefficient

-7.26p = -29.04

divide both sides by -7.26 to isolate the p

p = 4

Jayden buys 4 pounds of coffee