anisah.21a
  • anisah.21a
5 x − 7 y = −8 −7 x + 2 y = −20 How to solve for x and y with substitution method
Mathematics
schrodinger
  • schrodinger
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precal
  • precal
5x-7y=-8 isolate x 5x=7y-8
anisah.21a
  • anisah.21a
then?
anisah.21a
  • anisah.21a
it gives you x=7/5y-8/5

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precal
  • precal
\[x=\frac{ 7y-8 }{ 5 }\]
precal
  • precal
yes that is correct
anisah.21a
  • anisah.21a
so that is x?
precal
  • precal
now sub in the other equation
precal
  • precal
yes, it is
anisah.21a
  • anisah.21a
not right answer
anisah.21a
  • anisah.21a
it doesn't give me a long enough response for the x value when i try to submit the answer . ive tried it many times
precal
  • precal
ok are you using math lab?
precal
  • precal
x=(7/5)y-(8/5)
precal
  • precal
try that one
precal
  • precal
are you looking for the solution
anisah.21a
  • anisah.21a
yes
anisah.21a
  • anisah.21a
not a long response but one number
precal
  • precal
x=4 y=4
anisah.21a
  • anisah.21a
how did you get that?
precal
  • precal
There are many ways to do this problem
precal
  • precal
I used my calculator
anisah.21a
  • anisah.21a
may i ask, what you did on the calculator?
anisah.21a
  • anisah.21a
i'll rate you best response if you explain yourself and not just tell me the answer, thank you.
precal
  • precal
I did explain it. I have to go now

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