SOLUTION: i need help with this one math problem i already did the problem but i don't think it's right and i would like for you to tell me whether it is or not and if it's wrong will you pl

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Question 22096: i need help with this one math problem i already did the problem but i don't think it's right and i would like for you to tell me whether it is or not and if it's wrong will you pleasze tell me what i did wrong. proiblem:
2x+-y=32
2x+y=60. the answer i got to this problem was 23,-45.

Answer by AnlytcPhil(1806) About Me  (Show Source):
You can put this solution on YOUR website!
i need help with this one math problem i already did the problem but i don't
think it's right and i would like for you to tell me whether it is or not and
if it's wrong will you pleasze tell me what i did wrong. proiblem:
2x+-y=32 
2x+y=60. the answer i got to this problem was 23,-45.

It's half correct. Your value of x = 23 is correct.  So you must have made an
error when you substituted 23 for x to find y

I'm a little confused about the double sign in "2x+-y=32".  Usually we don't
find a "+-" given in an equation.  I take that to be "2x-y=32".

To find the correct value for y, we substitute 23 for x in either of the
equations:

Using the first

   2x - y = 32
2(23) - y = 32
   46 - y = 32
       -y = 32 - 46
       -y = -14
      -1y = -14 
        y = -14/-1
        y = 14

So the solution is (x,y) = (23,14)

Edwin
AnlytcPhil@aol.com