SOLUTION: x+9/y=13 and 3x−6/y=6 Use the method of elimination to solve.

Algebra ->  Equations -> SOLUTION: x+9/y=13 and 3x−6/y=6 Use the method of elimination to solve.       Log On


   

Question 892231: x+9/y=13 and 3x−6/y=6
Use the method of elimination to solve.
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
THIS IS THE CORRECT SOLUTION AND PROCESS:

SIMPLER USE OF ELIMINATION

x%2B9%2Fy=13 AND x-2%2Fy=2

Multiply all members by y.
xy%2B9=13y
xy-13y=-9
-
xy-2=2y
xy-2y=2
-
The system to solve using the elimination method is:
system%28xy-13y=-9%2Cxy-2y=2%29
Eliminating the xy term is the easy part. Here will be elimination of the y terms.
Multiply this way.
system%282xy-26y=-18%2C13xy-26y=26%29

Subtract the first equation from the second equation:
13xy-26y-%282xy-26y%29=26-%28-18%29
11xy=26%2B18
11xy=44
highlight_green%28xy=4%29
-
Going back to the earlier system and eliminating xy,
xy-2y-%28xy-13y%29=2-%28-9%29
-2y%2B13y=11
11y=11
highlight_green%28y=1%29

SOLUTION: If y is 1, then xy=4 means x=1.



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THE EARLIER POSTING HAD SOME MISTAKES AND WAS WRONG:
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Answer by MathTherapy(10551) About Me  (Show Source):
You can put this solution on YOUR website!
x+9/y=13 and 3x−6/y=6
Use the method of elimination to solve. 


WHAT THE H..L is the other person (respondent) who's attempting to answer this question, talking about?

Is he or she referring to or is he or she ATTEMPTING to solve this same PROBLEM I'm looking at? Where does

all that "mumbo jumbo" play into this problem? My, my, my!!!

highlight_green%28system+%28x+=+4%2C+y+=+1%29%29