Answer: The cost of one eraser is $0.6
Step-by-step explanation:
When solving this problem, it's best to set up a system of equations. Let pencil = p and eraser = e.
p = $0.25 + e
8p = $6.80
Now, we can use the second equation to solve for p by dividing both sides by 8. 6.8/8 = 0.85. Therefore, p = $0.85.
Then, use the value of p to find e by plugging the value of p we just found back into the first equation we wrote. Doing so, we get $0.85 = $0.25 + e. To solve for e, we must subtract 0.25 from both sides, giving use 0.85-0.25 = 0.6
Therefore e = $0.6, so the cost of one eraser is $0.6 or 60 cents.
