An apartment building contains 12 units consisting of one and two bedroom apartments that rent for $360 and $450 per month, respectively. When all units are rented, the total monthly rental is $4,950. What is the number of two bedroom apartments? PLZZ EXPLAINN

Question

anonymous · Answer

put $x$ as the number of 360 aparA \subseteq Ctments, then, since the total is 12, the number of 450 apartments is $12-x$
the x apartments bring is $360x$ dollars and the $12-x$ 450 apartments bring in 
$450(12-x)$ dollars for a total of 
$$360x+450(12-x)$$ dollars. 
you know this is equal to 4950 so set 
$$360x-450(12-x)=4950$$ and solve for x

anonymous · Answer

first line should read 
let $x$ be the number of 360 apartments. big typo there

anonymous · Answer

Thanks a lot. That really helped :)