If 7 shirts and 4 sweaters cost $192, and 8 shirts and 7 sweaters cost $268, what is the cost of one shirt and what is the cost of one sweater?

The cost of one shirt is $16 and the cost of one sweater is $20.

Step-by-step explanation:

Let the cost of one shirt be x and the cost of one shirt be y.

7x + 4y = 192 Equation 1

8x + 7y = 268 Equation 2

Equations 2-1:

8x + 7y - 7x - 4y = 268 - 192

x + 3y = 76

x = 76-3y Equation 3

Subsitute x = 76-3y into Equation 1:

7x + 4y = 192

7(76-3y) + 4y = 192

532 - 21y + 4y = 192

532 - 17y = 192

-17y = 192-532

-17y = -340

17y = 340

y = 340 ÷ 17

y = 20 (The cost of one sweater is $20)

Substitute y = 20 into Equation 3:

x = 76-3y

x = 76 -3(20)

x = 76 - 60

x = 16 (The cost of one shirt is $16)

plz yuo

step-by-step explanation:

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )