SOLUTION: I need to solve by addition: 5x-4y=9 and -x+2y=3. I know I need to multiply the first two coefficients by 5, but they both come up as -5. Is there any solution or is there no solut

Question 561290: I need to solve by addition: 5x-4y=9 and -x+2y=3. I know I need to multiply the first two coefficients by 5, but they both come up as -5. Is there any solution or is there no solution because it is dependent?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
(1)
(2)
Just leave (1) alone and multiply both sides of (2)
by
If you do the same thing to both sides, the equation is still true
(2) is the result
Now just add the equations
(1)
(2)

Plug this value back into (2)
(2)
(2)
(2)
(2)
The solution is (5,4)
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