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Umnica [9.8K]
3 years ago
8

7.

Mathematics
1 answer:
mylen [45]3 years ago
5 0

The cafeteria sold 41 corn chips and 80 potato chips.

Step-by-step explanation:

Let,

Corn chips = x

Potato chips = y

Price of corn chips = $0.80

Price of potato chips = $0.60

According to given statement;

x+y= 121   Eqn 1

0.80x+0.60y=80.80   Eqn 2

Multiplying Eqn 1 by 0.80

0.80(x+y= 121)\\0.80x+0.80y=96.80\ \ \ Eqn\ 3

Subtracting Eqn 2 from Eqn 3

(0.80x+0.80y)-(0.80x+0.60y)=96.80-80.80\\0.80x+0.80y-0.80x-0.60y=16\\0.20y=16

Dividing both sides by 0.20

\frac{0.20y}{0.20}=\frac{16}{0.20}\\y=80

Putting y=80 in Eqn 1

x+80=121\\x=121-80\\x=41

The cafeteria sold 41 corn chips and 80 potato chips.

Keywords: linear equation, subtraction

Learn more about linear equations at:

  • brainly.com/question/4639731
  • brainly.com/question/4655616

#LearnwithBrainly

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