Posted by Jenny on Monday, September 23, 2013 at 8:46pm.
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
4/8y21=3 What is y?

Math  Ms. Sue, Monday, September 23, 2013 at 8:55pm
Assuming you copied the problem correctly, your answer is correct.
4/8y21=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

Math  MathMate, Monday, September 23, 2013 at 8:59pm
If you mean
(4/8)y  21 = 3
then y=48 as you got.
If the question were
(4/8)y21=0
then y=42

Math  Jenny, Monday, September 23, 2013 at 9:10pm
Thank you!

Math  Ms. Sue, Monday, September 23, 2013 at 9:11pm
You're welcome.
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