SOLUTION: solve the linear system: x-2y=-5 , -3x+y=0 I need step by step help.

Question 397052: solve the linear system: x-2y=-5 , -3x+y=0 I need step by step help.
Found 2 solutions by stanbon, josmiceli:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
solve the linear system: x-2y=-5 , -3x+y=0
-------
x-2y = -5
-3x+y = 0
---------
Multiply thru the 1st equation by 3 to get:
3x-6y = -15
-3x+y = 0
--------
Add and solve for "y":
-5y = -15
y = 3
------
Solve for "x":
x-2y = -5
x-2(3) = -5
x-6 = -5
x = 1
-----
Solution: (1,3)
================
Cheers,
Stan H.
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Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Hi,
(1)
(2)
-------------
The most important rule is:
"What ever you do to one side of an equation,
you must do to the other side."
Multiply both sides of (2) by
then add the equations
(1)
(2) (notice that )

Now substitute this value in (1)
(1)
Subtract from both sides

Divide both sides by

The solution is (1,3)

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