Problema Solution
Salim sells fax machines that come in Standard and Enhanced models. The Standard model sells for $325 and the Enhanced model sells for $385. If Salim sold a total of 35 units and took in $12,575, how many of the Enhanced model did he sell?
Answer provided by our tutors
A system of equations where you set up two equations: x + y = 35 and 325x + 385 y = 12575. Solve both equations so that they're in the form of y = mx + b. y = 35 -x and y = 12575/385 - 325/385x. Set both equations equal to each other and solve for x. You get x = 15. Now plug x back into the equation x + y = 35. Solve for y and you get 20. He sold 20 Enhanced Machine Models.