Posted by Terri on Thursday, November 26, 2009 at 1:54pm.
On the problem 9x+7y=4
x=234y
solve by substitution
Do you mean to put 9 in the place of x=234y (9x=234y)

algebra  H, Thursday, November 26, 2009 at 11:53pm
It would look like this...9(234y)+7y=4
Then you simplify
9*23=207
9*4y=36y
so you now have
20736y+4y
Combine like terms
36y+4y=32
32y=4
Finally you divide
the end reslut is y=8