ibn-rushd owns cool groove, a company that sells and installs automobile sound systems. cool groove charges $185 for each small system and $235 for each large system installed. ibn-rushd reported that last month her company installed 135 and collected $27,225 in total receipts. during that month, how many small systems and large systems were installed?
x = large systems
135-x = small systems
235 x = cash from large systems
185 (135-x) = cash from small systems
Added together the cash = 27225 for the month
235 x + (185 )(135-x) = 27225 solve for x (the number of large systems) then small systems = 135 - x