SOLUTION: I am trying solve by graphing but my calculations are wrong. Can you help me? 5x-3y=15 2x-y=4

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Question 907189: I am trying solve by graphing but my calculations are wrong. Can you help me?
5x-3y=15
2x-y=4

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
(1) +5x+-+3y+=+15+
(2) +2x+-+y+=+4+
-------------------
+3y+=+5x+-+15+
(1) +y+=+%285%2F3%29%2Ax+-+5+
-------------------
(2) +y+=+2x+-+4+
-----------------
Here are the plots:
+graph%28+400%2C+400%2C+-10%2C+5%2C+-15%2C+5%2C+%285%2F3%29%2Ax+-+5%2C+2x+-+4+%29+
My guess for the solution
is ( -3, -10 )
-------------
check:
Multiply both sides of (2) by +3+
and subtract (2) from (1)
(1) +5x+-+3y+=+15+
(2) +-6x+%2B+3y+=+-12+
-----------------------
+-x+=+3+
+x+=+-3+
and
(1) +5x+-+3y+=+15+
(1) +5%2A%28-3%29+-+3y+=+15+
(1) +-15+-+3y+=+15+
(1) +3y+=+-30+
(1) +y+=+-10+
( -3, -10 )
OK