I still can't understand this one.In class we got 42 but I got 48 and when I check it none of them match up

4/8y-21=3 What is y?

Assuming you copied the problem correctly, your answer is correct.

4/8y-21=3

4/8y = 3 + 21

4/8y = 24

y = 24 / (4/8)

y = 24 * (8/4)

y = 192/4 = 48

Proof:
1/2 (48) - 21 = 3
24 - 21 = 3

If you mean

(4/8)y - 21 = 3
then y=48 as you got.
If the question were
(4/8)y-21=0
then y=42

Thank you!

You're welcome.

To solve the equation 4/8y - 21 = 3 for the variable y, we can follow these steps:

Step 1: Simplify the equation by multiplying both sides by 8 to clear the fraction:
8 * (4/8y - 21) = 8 * 3

This simplifies to:
4y - 168 = 24

Step 2: Isolate the variable term by adding 168 to both sides of the equation:
4y - 168 + 168 = 24 + 168

This simplifies to:
4y = 192

Step 3: Solve for y by dividing both sides of the equation by 4:
4y/4 = 192/4

This simplifies to:
y = 48

Therefore, the value of y that satisfies the equation 4/8y - 21 = 3 is y = 48.