Posted by michael R 43 on Thursday, July 3, 2014 at 10:31am.
5x  9y = 7,
7y  3x = 5
solve using any algebraic method

algebra  Steve, Thursday, July 3, 2014 at 10:35am
7y3(9y+7)/5 = 5
y = 1/2
so, x = 1/2

algebra  michael R 43, Thursday, July 3, 2014 at 11:02am
Steve can you explain how you got the answer to this??

algebra  Steve, Thursday, July 3, 2014 at 11:39am
sure. the first equation
5x  9y = 7
tells us that x = (9y+7)/5
Just plug that into the 2nd equation, and you get
7y3(9y+7)/5 = 5
fractions are a nuisance, so multiply through by 5:
35y  3(9y+7) = 25
35y  27y  21 = 25
8y = 4
y = 1/2
Now plug that value into either equation and solve for x.
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