SOLUTION: how do i solve this system by any method? I know you plug in equation of x = into the other equation but then how do you find the solution set? x = 2y-9 -2x+4y = 18

Algebra ->  Trigonometry-basics -> SOLUTION: how do i solve this system by any method? I know you plug in equation of x = into the other equation but then how do you find the solution set? x = 2y-9 -2x+4y = 18       Log On


   

Question 929719: how do i solve this system by any method?
I know you plug in equation of x =
into the other equation but then how do you find the solution set?

x = 2y-9
-2x+4y = 18

any help would be greatly appreciated,
thanks so much
Found 2 solutions by stanbon, TimothyLamb:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
x = 2y-9
-2x+4y = 18
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Substitute for "x" and solve for "y"::
-2(2y-9) + 4y = 18
-4y + 18 + 4y = 18
----
18 = 18
--------
That is always true and tell you the two equations
are really the same equation.
The solution is all points of the form (x,(x+9)/2)
where x is any Real Number.
---------------
Cheers,
Stan H.
----------------

Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
x = 2y-9
-2x+4y = 18
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put the system of linear equations into standard form
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x - 2y = -9
-2x + 4y = 18
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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answer:
This linear system is singular. It has no solution
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