SOLUTION: All the units in an apartment building have either one or two bedrooms. The five story building has 10 apartments on each floor. Each one bedroom unit rents for $425 per month and

Question 909238: All the units in an apartment building have either one or two bedrooms. The five story building has 10 apartments on each floor. Each one bedroom unit rents for $425 per month and each two bedroom unit rents for $550 per month. When all of the units are rented, the total monthly income is $25,000. How many one bedroom units does the apartment building have ?
I have put it into two equations:
x+y=50
425x+550y=25000
Then I put it in matrix equation format:
[ 1 2 ] [x]= [ 50 ]
[425 550] [y]= [25,000]
*I couldn't make the brackets go around the 2 rows but just know that
[1 2 ]
[425 550] is one bracket around the whole thing if that makes sense*
I'm supposed to put it in the calculator but I don't know how to put it in.
Thanks for your help!

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
x=20 one bedroom
y=30 two bedroom

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