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valina [46]
4 years ago
7

You buy a container of cat litter for $11.50 and a bag of cat food for x dollars. The total purchase is $16.80, which includes 5

% sales tax. Write and solve an equation to find the cost of the cat food.
Mathematics
1 answer:
Anni [7]4 years ago
7 0

let cat food = x

 total plus 5% = 105% = 1.05

1.05 * (11.50 + X) = 16.80

12.075 + 1.05x = 16.80

1.05x = 16.80-12.075

1.05x = 4.725

x = 4.725 / 1.05

x= 4.50

 the cat food cost $4.50


11.50 +4.50 = 16.00

16.00 * 0.05 = 0.80

16.00 + 0.80 = 16.80


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