Suppose a college surveyed its students and found that two-thirds of them sleep at least seven hours each night. on a campus of
1 answer:
You might be interested in
First add 5 to right side
Next , to cancel the 7, you need to multiply by 7 on both sides
Next , to cancel the 7, you need to multiply by 7 on both sides
For this case we can propose a system of equations:
x: Let the variable that represents the number of small cookies
y: Let the variable that represents the number of large cookies
According to the statement we have:
We multiply the first equation by -2:
We have the following equivalent system:
We add the equations:
We look for the value of the variable "x":
Answer:
They sold 80 small cookies and 50 large cookies