Ryan earns $5 for each small dog he walks and $8 for each large dog he walks. Today he walked 9 dogs and made a total of $51. How many large dogs did Ryan walk?

Question

anonymous · Answer

This is systems of equations

anonymous · Answer

s= small dog 
l= large dog

xapproachesinfinity · Answer

let x be the number of large dogs Ryan walks
and y the number of small dogs
x+y=9
8x+5y=51

xapproachesinfinity · Answer

you need to solve for x here

anonymous · Answer

s+l=9
5s=8l=51

anonymous · Answer

so I end up with 9x + 6y = 60 
Where do I go from there?

xapproachesinfinity · Answer

No that's not how you solve the system

xapproachesinfinity · Answer

first write y in terms of x like this 
y=9-x
then sub y into the second equation
8x+5(9-x)=51

xapproachesinfinity · Answer

solve for x to find the number of dogs you need

anonymous · Answer

Thank you!

xapproachesinfinity · Answer

welcome^_^

xapproachesinfinity · Answer

if you get x=2 then you got it correct!