An animal shelter has five times as many cats as dogs. Find the total number of cats if the total number of cats and dogs is 48.
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OpenStudy (anonymous):
Call dogs x and cats y. so from the information you can write two equations
Five times as many cats as dogs
5x=y
total number of cats and dogs is 48
x+y=48
now you have two simultaneous equations
5x=y
x+y=48
OpenStudy (anonymous):
Do you know how to solve now?
OpenStudy (anonymous):
i need a little more help
OpenStudy (anonymous):
Did you get stuck?
OpenStudy (anonymous):
yea
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OpenStudy (anonymous):
Well the first equation is already solved for y, so you can plug that expression into the other equation for y
x+5x=48
now just solve for x
OpenStudy (anonymous):
oh ok
OpenStudy (anonymous):
wait why is there 2 x's
OpenStudy (anonymous):
In the first equation 5x=y
so since y equals 5x we can plug 5x into the second equation in place of y, so we only have one variable to solve for
OpenStudy (anonymous):
is it 8
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OpenStudy (anonymous):
Yes x=8
so now that you know what x is, plug it into either equation and then solve for y
OpenStudy (anonymous):
6
OpenStudy (anonymous):
plug 8 into the second equation for x...
8+y=48
so y=?
OpenStudy (anonymous):
40
OpenStudy (anonymous):
Right so thats the number of cats
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