SOLUTION: 2x+y=5 2y=2x-8 Find the first variable (that you want to use) and isolate it then solve for it and then solve for the second variable find the numerical value of the first

Question 1190676: 2x+y=5
2y=2x-8

Find the first variable (that you want to use) and isolate it then solve for it
and then solve for the second variable
find the numerical value of the first variable
(I just typed out what the questions were. I'm not exactly sure how to solve these problems) :)
TYSM
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
2x+y=5
2y=2x-8 ---> y = x-4
Find the first variable (that you want to use) and isolate it then solve for it
---------
y is isolated and solved for in terms of x.
---
2x+y=5
Sub for y
2x + (x-4) = 5
3x - 4 = 5
3x = 9
x = 3
-----
y = x-4
y = -1
That's solved by substitution.
-----
Another way is elimination:
2x+y=5
2y=2x-8
----
2x +y = 5
2x-2y = 8
-------------- Subtract
3y = -3
y = -1
---
2x +y = 5
2x - 1 = 5
2x = 6
x = 3

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