Posted by Corie on Thursday, January 17, 2013 at 9:46am.
please someone tell me how to solve this. im very confused and im homeschooled so my teachers are no help and my mom cant do math. please please help!!!
thanks Dylan. but howd you get that?
for any proportion, you can cross-multipy, that is
(3y-8)(5) = (12)(y)
15y - 40 = 12y
15y-12y = 40
3y = 40
y = 40/3 or 13 1/3
ok im gonna go with Reiny's answer. thanks for breaking it down so I could see how you got the answer :)
You can always check any answer by simply subbing the answer back in the original equation, and use your calculator to compare the left side and the right side of the original equation.
Dylan's answer does not work.
It just depends on how the problem is actually written.
Is 3y-8 all over 12 or is 8 just over 12?
Because I solved 3y - (8/12) = (y/5), not [(3y-8)/12]= (y/5)...its just all in how you type your question.
I assumed that Corie skipped the brackets, and he meant (3y-8)/12.
The fact that is was called a "proportion" gave me that clue.
there were no brackets it was just written out as this well on mine it was.
if anyone can help me id gladly appreciate it thankz
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