anonymous
  • anonymous
Solve X+Y= 1 X-Y= 7
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
there has to be like one
anonymous
  • anonymous
of the answers
anonymous
  • anonymous
to the variables

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anonymous
  • anonymous
is that the whole question ???
anonymous
  • anonymous
Its a simultaenous equation do you have any ideas?
anonymous
  • anonymous
yes thats the whole question the + equation is on top of the - equation
anonymous
  • anonymous
oh i hate question like this
anonymous
  • anonymous
I don't have a clue it all looks foriegn to me. I looked through my notes and I see nothing similar to this problem.
anonymous
  • anonymous
yah i've learned some really tough things and i have never done something like this
anonymous
  • anonymous
Start by\[X=1-Y\] Plug that into the second eqn
anonymous
  • anonymous
ok but htne there aren't any values for the the other equations do I'm suiming it has to be a negative number. someone told me for a similar problem with one negative answer and one positive answer I could add both equations and then muliplty the result and substitute it for either varible to find the other. it worked for that problem but not for this one wwhere both answers are positive
anonymous
  • anonymous
then*
anonymous
  • anonymous
well if it is like how @incomplte said then i have the answer but if it is like how you are saying then i dont know
anonymous
  • anonymous
ok ill try it his way but im still coming up blank
anonymous
  • anonymous
ok for the second one it is 1 - (-7)
anonymous
  • anonymous
AND YOU WOULD GET ????
anonymous
  • anonymous
8
anonymous
  • anonymous
Eqn 2 becomes\[(1-Y)-Y = 7\] So1-2Y=7 -2Y=6 Y=-3
anonymous
  • anonymous
correct @bleumom22 see now you get for #2
anonymous
  • anonymous
Can you solve for X now?
anonymous
  • anonymous
just substitiue for y and then ill get the x variable?
anonymous
  • anonymous
Good. Let me know what you get for X
anonymous
  • anonymous
ok x=4?
anonymous
  • anonymous
Yes.
anonymous
  • anonymous
good job
anonymous
  • anonymous
im sorry can you tell me the first step to solving this.
anonymous
  • anonymous
Glad to help :)
anonymous
  • anonymous
I have two exams next week and need to remember this.
anonymous
  • anonymous
Just start by Solving for X So from X+Y=1, say X=1-Y then plug that into the second equation.
anonymous
  • anonymous
oooh. ok and then just input the answer for one of the variables then divide the varible by its self and the answer by its self to get the variable's value?
anonymous
  • anonymous
as one of the varibles* to reverse calculate?
anonymous
  • anonymous
Yes. If you have any more questions just @ my username. Ill get a notification and i can help later
anonymous
  • anonymous
and i will try to help you if you need it ok
anonymous
  • anonymous
ok thank you to @incomplte and @ashlynn143
anonymous
  • anonymous
your welcome i gtg for like 15 min

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