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Mathematics 14 Online
OpenStudy (anonymous):

Find dy/dx in terms of x and y if 9 x y + 5 x + y = 13.

OpenStudy (anonymous):

9*(x'y+xy')+5+y'=0

OpenStudy (anonymous):

solve for y'

OpenStudy (anonymous):

so 9y+9xy'+5+y'=0

OpenStudy (anonymous):

9xy'+y'=-9y-5

OpenStudy (anonymous):

y'=(-9y-5)/9x+1

OpenStudy (anonymous):

i believe that is correct

OpenStudy (anonymous):

yeah that makes sense. thanks!

OpenStudy (anonymous):

np

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